In Russia, activist groups are reporting that a priest who gave an anti-war sermon on Sunday has been arrested and is due to face a court later today.

BBC Russia journalist Andrey Zakharov reported that Father Ioann Burdin was detained shortly after he made a sermon to a small congregation in the village of Karabanovo.

He’d preached against the war, described to locals the ongoing shelling and destruction in Ukrainian cities, and also shared anti-war images and a petition on the parish’s website.

Police have charged him with ‘discrediting the use of the Armed Forces’ -a criminal offence established by Russia’s state duma just last week.

Since the start of the war, there’s been a brutal crackdown on protest activities in Russia, where despite the risks thousands of people are still taking to the streets in dozens of cities to protest.

More than 13,000 people have been arrested so far, including over 4,600 on Sunday, local NGO trackers say.

Another tweet from Andrey shows the extent to which anti-war messages are being censored: Russian officials painting ice to cover a 'no to war' message etched into the ground:

There have been reports of renewed Russian shelling in the southern port city of Mykolaiv.

City officials have yet to comment on the reports, but the local "News-N" media outlet said that the shelling began at around 05:00 local time (03:00 GMT).

And a video posted by New York Times reporter Michael Schwirtz, which you can view below, appeared to show the night sky light up with explosions.

Schwirtz tweeted that the shelling appears to be concentrated on the eastern outskirts of the city.

The renewed assault comes a day after Ukrainian forces repelled a Russian attack on the city of 476,100 people and recaptured the local airport.

As Russia's invasion of Ukraine rages on, children with cancer have had to join the tens of thousands of Ukrainians forced to flee towards neighbouring Poland.

The children are being evacuated by Herosi, a non-governmental organisation coordinated by the US-based St Jude Children's Research Hospital.

The organisation is now trying to find the young patients find places to receive treatment - some of it urgently needed - in medical centres across Europe.

The BBC's Mark Lowen reports:

Image source, Getty Images

New Zealand has announced a new list of sanctions targeting dozens of Russian nationals in a bid to stop the country from being used as a base from which to avoid punishments imposed by other Western nations.

Prime Minister Jacinda Ardern said the new rules will impose a travel ban on 100 Russian oligarchs and will prevent superyachts, ships, and planes registered in Moscow from entering New Zealand's airspace or waters.

Image source, Getty Images

Oil prices have soared to the highest level since 2008 after the US said it was discussing a potential embargo on Russian supplies with its allies.

Brent crude - the global oil benchmark - spiked above $139 a barrel in Asia trade, before easing to below $130.

Energy markets have been rocked in recent days over supply fears triggered by the Russian invasion of Ukraine.

Consumers are already feeling the impact of higher energy costs as fuel prices and household bills jump.

Read more about the soaring cost of oil here

Image source, Getty Images

If you're just joining us, here's what you may have missed as the Russian invasion of Ukraine enters its 12th day:

• UK defence officials have said they believe Russian forces made minimal gains over the past 48 hours, with its troops bogged down by stiff Ukrainian resistance and poor logistical support
• But Ukrainian commanders have warned that Russian forces have been regrouping and are preparing to launch an all-out assault on the capital Kyiv
• Moscow's forces have been heavily shelling towns on the periphery of the city and re-supplying tank units with fuel moved in from Belarus in preparation for the attack, officials said
• In the south-eastern city of Mariupol, Russian shelling has killed dozens of people and Ukrainian President Volodymyr Zelensky has warned Moscow's troops that his forces will pursue any soldier that commits war crimes to the grave
• Senator Marco Rubio, the highest-ranking Republican on the Senate Intelligence Committee, told CNN on Sunday that imposing a no-fly zone over Ukraine would almost certainly mean "starting World War Three”
• Sanctions continue to target Moscow's economy, with Netflix, American Express, KPMG and PricewaterhouseCoopers among the latest major companies to suspend services in Russia

American intelligence teams are reportedly working to interrupt Russian digital attacks and communications, the New York Times reports, external.

According to the Times, personnel from US Cyber Command based in the US and Germany are providing intelligence from satellite imagery and electronic intercepts to the Ukrainian military within "an hour or two" of being collected.

The US has also supplied Ukrainian President Zelensky with encrypted communications equipment, enabling him to call Biden on a secure line, reports the Times. On Saturday, Zelensky held a 35-minute phone call with Biden.

On Thursday, White House press secretary Jen Psaki said the US was sharing intelligence with Ukraine "in real time". No further details were given.

Image source, Reuters

With war raging around them, some Ukrainians have reportedly turned to music to keep their spirits up.

Viral videos have emerged of what appear to be Ukrainians singing or playing music in shelters or public spaces.

The clips are being shared widely on social and local media, but have not been verified by the BBC.

One piece of footage said to be from a bomb shelter shows a young girl singing the hit song Let It Go from the 2013 movie Frozen.

A second clip being shared online shows a woman playing violin in what is also described as a bomb shelter.

Another clip, taken by a Reuters correspondent in the city of Lviv, western Ukraine, shows a woman playing Louis Armstrong's What a Wonderful World outside the city's main train station.

Enjoy...

Image source, Getty Images

UK defence officials have said they believe Russian forces made minimal gains over the past 48 hours, with its troops remaining bogged down by stiff Ukrainian resistance and poor logistical support.

In a daily intelligence report published by the Ministry of Defence, officials said it is "highly unlikely that Russia has successfully achieved its planned objectives to date".

But they added "a high level of Russian air and artillery strikes have continued to hit military and civilian sites in Ukrainian cities" over the past 24 hours.

"Recent strikes have targeted Kharkiv, Mykolaiv and Chernihiv, and been particularly heavy in Mariupol," the assessment said.

It comes as the Chief of the UK's Defence Staff, Admiral Sir Tony Radakin, told the BBC that Russian troops had been failing to operate "in a competent fashion", and this was "impacting on morale".

He added that "those that have been leading the fight for Russia have suffered just terrible losses" since the invasion began.

Image source, Getty Images

Ukrainian defence officials have warned that Russia is preparing its forces to launch an all-out assault on the capital of Kyiv.

An update by the Ukrainian army's General Staff said Moscow's forces had started to gather resources for an attack on the city, with tanks and motorised infantry units advancing towards the nearby town of Irpin to lay the groundwork.

The update added that Russian commanders had been supplying their forces with fuel shipped from Belarus through the Chernobyl exclusion zone.

Elsewhere, officials reported that the Russian military was focusing its efforts on encircling the eastern cities of Kharkiv, Chernihiv, Sumy and the southern city of Mykolayiv.

Denmark has announced it will increase its defence spending in response to Russia's invasion of Ukraine.

Prime Minister Mette Frederiksen said all parties had agreed to increase the Nordic nation's annual defence spend to 2% of its GDP by 2033 - equivalent to $2.65bn (£2bn) each year.

The PM said it would also wean itself off its dependence on Russian natural gas. "Historic times call for historic decisions," Frederiksen said in Copenhagen.

Image source, Getty Images

Image source, Getty Images

Russia is recruiting Syrians skilled in urban combat to fight in Ukraine as Moscow prepares for intense street-to-street fighting in its push to seize major Ukrainian cities, US officials have told the Wall Street Journal. , external

Intelligence officials declined to tell the publication how many fighters have agreed to join the war, but said some have already travelled to Russia and are preparing to be deployed into Ukraine.

According to a publication in Deir Ezzor, external, Syria, Russia has offered volunteers from the country salaries of between $200 and $300 "to go to Ukraine and operate as guards" for six months at a time.

Officials in Moscow are said to believe the deployment of fighters hardened by over a decade of urban warfare in the Syrian Civil War could add muscle to their fight to seize key Ukrainian cities, including the capital Kyiv.

Israeli military veterans have been reportedly, external showing up to fight for Ukraine.

The British government plans to give nearly $100m (£74m) to Ukraine to help keep the government running amid the Russian invasion, Prime Minister Boris Johnson's office has announced.

The funding is to help pay for Ukrainian welfare, pensions and public-sector salaries.

The cash infusion is in addition to $290m already pledged to Ukraine, British authorities said.

The funds will be distributed through the World Bank's Multi-Donor Trust Fund. Other countries are already using the programme to fast-track money to Ukraine.

Image source, Getty Images

Video being widely shared online appears to show an aircraft being shot down over the skies of Kharkiv.

While the BBC has verified the video's authenticity, it is difficult to determine the precise location or whether it was a Russian or Ukrainian aircraft.

Local media have reported, however, that the plane is a Russian Su-25 ground attack aircraft that was brought down by Ukrainian anti-air defences near the embattled city.

Ukraine says it has downed more than 80 Russian aircraft and helicopters since the war began.

On Sunday, a senior US defence official said that the airspace over Ukraine remained contested, and Ukraine's air defence network was still "effective and in use".

Russian gymnast Ivan Kuliak is being investigated after wearing what looked like a war symbol on his leotard as he stood next to a Ukrainian rival on the podium in Qatar on Saturday.

The International Gymnastics Federation (FIG) said it had opened disciplinary proceedings against Kuliak for his "shocking behaviour" at the Apparatus World Cup in Doha.

After earning bronze in the parallel bars final, Kuliak taped a letter 'Z' on to his chest and took to the podium next to gold medal winner Illia Kovtun of Ukraine.

The letter Z has been seen painted on the side of Russian tanks and military vehicles in Ukraine, as well as being worn by pro-war politicians in Russia.

This weekend was the final opportunity for Russian and Belarusian gymnasts to compete after their countries were sanctioned by the FIG as a result of Russia's invasion of Ukraine.

Image source, Volodymyr Zelensky's office

Ukraine's president has warned Russian troops that his forces will pursue any soldier that commits war crimes in Kyiv's territory to the grave.

Delivering his nightly address to the Ukrainian people from Kyiv, Volodymyr Zelensky addressed a message to Moscow's troops, warning them they would face "a day of judgement" for "deliberate murder" during the invasion of his country.

"How many families like this have died in Ukraine? We will not forgive. We will not forget. We will punish everyone who committed atrocities in this war. On our land," Zelensky said.

"There will be no quiet place on this earth for you, except for the grave," he added.

"It seems everything Russian servicemen have already done is still not enough for them. Not enough ruined destinies. Mutilated lives. They want to kill even more."

Zelensky also urged Western leaders to take firmer action against Moscow, telling them the "audacity of the aggressor is a clear signal to the West that sanctions against Russia are not enough".

The BBC’s Jeremy Bowen was on the frontline in Irpin, near Kyiv, as civilians came under Russian fire while trying to flee.

Warning: This video contains scenes viewers may find distressing.

A number of big international companies announced they'd be suspending their services in Russia on Sunday:

• The streaming giant Netflix - which had already announced it was suspending future projects and acquisitions in the country - said it would stop its streaming service there, too, "given the circumstances on the ground"
• US company American Express said it was suspending its operations in both Russia and Belarus because of Russia's "unjustified" attack on Ukraine. The US company said American Express cards would no longer work at businesses or ATMs
• Visa and MasterCard suspended all operations in Russia earlier on Sunday
• Two of the Big Four accounting firms - PricewaterhouseCoopers (PwC) and KPMG - announced they would be cutting their Russian firms from their wider networks
• And lastly, TikTok announced it would suspend live streaming and new content on its video service while it reviews the safety implication of a new law which threatens to jail anyone the authorities deem to have spread "fake" news about the armed forces

Read more - Growing numbers of firms pull back from Russia

Image source, Reuters

Pentagon officials have been briefing journalists on the latest US intelligence assessment of the conflict.

A senior defence official said the US does not believe that a Russian amphibious operation aimed at taking the Black Sea city of Odesa is imminent.

Earlier President Zelensky warned that Russian forces were preparing to bombard Odesa, which is close to the Moldovan border and the Russia-backed breakaway Moldovan region of Transnistria.

The US defence official also said the US had observed only ‘limited’ changes on the ground in Ukraine over the past day, with Russian efforts to seize Kyiv, Kharkiv and Chernihiv being hotly contested by Ukraine.

A 65km (40-mile) Russian convoy near Kyiv remains stalled and the airspace over Ukraine remains contested despite aircraft losses on both sides.

The US estimates that 600 Russian missile launches of various kinds have taken place since the beginning of Russia’s invasion on 24 February, the official said.

The Pentagon believes that approximately 95% of the Russian forces it had amassed near Ukraine’s border have now been committed to the offensive and deployed into Ukraine.

It's just after midnight in Ukraine - as the country moves into the early hours of Monday morning, here are Sunday's key developments:

• At least three people - a mother and two children - died as mortar fire hit an evacuation route from the town of Irpin near Kyiv, which has been under heavy bombardment. Civilians have been fleeing across a destroyed bridge that was blown up by Ukrainian forces to prevent a Russian advance on the capital
• Another attempt at a ceasefire in the southern city of Mariupol for people to evacuate failed - with both sides again blaming the other. The Red Cross said the sides had not agreed any details for the evacuation. The city has been without electricity and water for days
• The global nuclear watchdog says it is very concerned by reports that the Zaporizhzhia nuclear plant is under the orders of the Russian commander whose forces seized it. The International Agency for Atomic Energy's head Rafael Grossi says it is vital to safety that staff can work "free of undue pressure"
• More than a million people have crossed into Poland - about two-thirds of the roughly 1.5 million people to flee the country so far
• On the diplomatic front, Russia's Vladimir Putin told France's Emmanuel Macron that Russia would achieve its aims through "negotiation or war", according to a French readout of their nearly-two-hour call. Earlier on Sunday he told Turkish leader Recep Tayyip Erdogan much the same thing
• In Russia, over 4,600 people were reportedly detained at anti-war demonstrations - more than 13,000 people have been detained since the war began
• The corporate exodus from Russia continues - Netflix, PwC and American Express all announced they were suspending services in Russia. TikTok also suspended live streaming and new content to its video service

Read more - Your guide to understanding day 11 of the conflict