Mariupol Mayor Vadym Boichenko tells the BBC fighting has reached the city centre, confirming earlier Russian reports
Ukraine's President Zelensky says Russian shelling is still preventing the establishment of effective humanitarian corridors from Mariupol
People who have managed to escape in recent days describe scenes of terror in the city, which is under sustained Russian bombardment
In the strategic southern city Mykolaiv, dozens have been killed in a Russian attack on an army barracks, a Ukrainian MP says
Vladimir Putin has spoken to tens of thousands of Russians at an event celebrating eight years since the annexation of Crimea
US President Joe Biden has warned China not to provide Russia with military equipment in a call with President Xi Jinping
Ofcom says it has revoked Russian state-backed broadcaster Russia Today's licence to broadcast in the UK with immediate effect.
It adds in a statement: "We have done so on the basis that we do not consider RT's licensee, ANO TV Novosti, fit and proper to hold a UK broadcast licence."
Image source, State Emergency Service/TelegramOne person has been killed and four wounded after debris from a downed Russian missile fell on a residential building in a northern part of Kyiv, emergency services say.
Services say 12 people were rescued and 98 were evacuated from the five-storey building in the Podilskyi district.
Photos shared by emergency services show firefighters battling to control a blaze, amid badly damaged buildings, burnt-out vehicles and a large crater. Rescue efforts are ongoing, they say.
Image source, State Emergency Service/Telegram
Image source, Getty ImagesStrikes reportedly hit buildings near Lviv's airport
We've been bringing you updates about explosions near Lviv - the first time the western city has come under attack since Russia launched its invasion.
Residents and BBC reporters in Lviv reported hearing a series of explosions early this morning, before seeing a thick plume of black smoke rising in the sky from outside the city.
Lviv's mayor then said Russian missiles had struck the area near the airport, hitting an aircraft repair plant building but not the airport itself. The plant had stopped working an no-one was hurt, he said.
Ukraine's air force says six cruise missiles were fired from the Black Sea. Two of them were destroyed by anti-aircraft missiles.
It said the type of missile was a Kh-555 - an air missile launched from heavy strategic bombers.
Image source, Getty ImagesA plume of smoke could be seen rising in the direction of Lviv airport
Russia's defence ministry says separatists in eastern Ukraine, with help from Russia's armed forces, are "tightening the noose" around the Ukrainian city of Mariupol, Russia's RIA Novosti news agency reports.
The ministry adds that fighting is ongoing in the centre of Mariupol.
This morning the Institute for the Study of War, a US think tank, said Mariupol is likely to fall in coming weeks, external amid a sustained Russian assault.
On Wednesday, Mariupol's theatre - where civilians were sheltering - was destroyed, with Ukrainian authorities saying it had been shelled by Russia.
The Russian word for "children" had been marked on the ground in large letters in two locations outside the building, in the hope of warning bombers away.
Ukraine war: Mariupol theatre destroyed in bombing
For almost three weeks, Mariupol has been under constant shelling by Russian forces, which have completely surrounded the city. About 300,000 people are trapped but it's been reported 30,000 have managed to flee.
As we enter day 23 of the Russian invasion, the Ukrainian defence ministry says in its daily update on Facebook that an estimated 14,200 Russian soldiers have been killed since the conflict began.
Pinning down the exact number of casualties on each side has proven challenging, with both Russia and Ukraine claiming wildly different tallies and losses.
In a rare update on 3 March, Russia claimed 498 of its troops had been killed in combat, but it has remained silent about releasing further figures since then.
Meanwhile, US officials said on Thursday the number of Russian casualties could well be over 7,000, with up to 14,000 injured.
Among other damage inflicted on Russian armaments and vehicles, Ukraine claims its forces have also taken down:
The BBC has been unable to independently verify these claims.
In the southern city of Voznesensk in the Mykolaiv region of Ukraine a warehouse where weapons were being stored has reportedly been struck by Russian shelling, reports Ukraine 24 citing the city's mayor.
There isn't any information yet on whether there are casualties, it adds.
Jonah Fisher
BBC News, Lviv
Image source, ReutersA large cloud of smoke is drifting across the horizon from a point about four miles to the west of Lviv city centre.
The local mayor says a building used to repair aircraft next to the city airport was hit in the early hours of the morning - with no reports of casualties.
This Russian strike - most likely with cruise missiles - is the closest the war has come to the historic city of Lviv.
Up until now western Ukraine has been quieter than the rest of the country and has been used as a safe haven, a hub for people fleeing and a supply route, both for humanitarian and military purposes.
In the past week there have been signs of a shift, with another airstrip and a military base used by Nato troops for training hit by missiles.
The UK's Defence Ministry says Russian forces have made "minimal progress this week".
Their latest morning brief notes that Ukrainian forces around Kyiv and Mykolaiv "continue to frustrate Russian attempts to encircle the cities."
It notes that Kharkiv, Chernihiv, Sumy and Mariupol remain encircled by Russian forces and have experienced heavy shelling.
Image source, Ukraine SESIf you’re just joining us on this 23rd day of the Russian invasion, here is a quick recap of the latest developments:
This is Yvette Tan in Singapore signing off and handing over to my colleagues Alex Therrien, Jo Couzens and Jack Hunter in London.
No casualties have been reported so far after a building in Lviv was hit earlier this morning by several missiles, the city's mayor said in a post on Telegram.
The building has been identified as an airplane maintenance plant. Mayor Andriy Sadovyi said active work on the plant had earlier been stopped.
He added that rescue workers were currently on site.
We reported that a building near the area of the airport in Lviv was hit earlier this morning.
Lviv is just 80km (50 miles) from the Polish border, well away from the main battle zones in the east and south.
The area had been spared from bombardment, but five days ago there was a similar attack on a military training facility at Yavoriv, 30km (19 miles) from Lviv.
Our BBC correspondent in Lviv, Jonah Fisher, said the area used to be considered a "safe haven".
He says the shelling is possibly in an attempt by Russian forces to "cut off the supply of weapons into the country", as major routes tend to run via Poland.
Ukraine's emergency services have just put out an update saying that a firefighter attending to an explosion has been killed by further shelling.
The unnamed worker had been helping extinguish a fire at a shopping centre in Kharkiv on Thursday, after it was hit in a Russian strike.
"During firefighting, the enemy fired again. Two rescuers received shrapnel wounds," the service wrote on Its social media.
One later died of his injuries in hospital.
Image source, UKRAINE SESKharkiv was hit by several Russian bombs on Thursday
The mayor of Lviv has said on his Telegram , externalthat the airport was not hit, but a building next to it was.
"It's definitely not an airport," he wrote.
If confirmed as a Russian missile strike this is the closest that they have struck to the historic city of Lviv since the war began three weeks ago.
The mayor of the Sumy region, in the north east of Ukraine, has posted details about possible humanitarian corridors that could open Friday in the region.
Buses and vans would be sent to towns to help transport people - there are six different routes, all of which lead to Poltava in central Ukraine.
Sumy, which is close to the Russian border and frontline, has experienced heavy shelling, with power and water cut off in recent weeks.
Hugo Bachega
BBC News, Lviv
The air raid sirens went off in Lviv at 06:08 (04:08 GMT), and from our hotel we can now see thick smoke billowing in the distance.
Unconfirmed reports say the city’s airport has been hit.
The west of the country has been largely spared of attacks by Russia in this three-week old war.
Last Sunday, an attack at a military base near the city and close to the Polish border left at least 35 people dead.
A large cloud of smoke can be seen in the western city of Lviv coming from the direction of the airport 6 km (3.7 miles) from the city centre, said the BBC's correspondent Jonah Fisher, who is currently in the city.
An alert from the Ukrainian authorities said explosions had been heard near the city.
According to Ukraine 24 television station, external, blasts were heard in various parts of the city of Lviv, in western Ukraine at around 6:30.
On its Telegram channel, external, it posted a video showing a large plume of smoke on the horizon in the city.
Ukrainian journalist Ostap Yarysh, who reports for Voice of America's Ukrainian service, said in a tweet that he heard several explosions.
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Ukraine's state emergency services has shared these photos of overnight evacuations from the Kyiv region.
More than 1,000 Ukrainians were ferried out Thursday night on buses and in cars, officials said in a post on social media.
It added that they were currently in a "safe place".
Image source, UKRAINE SESRescuers and officers in fatigues help usher fleeing civilians onto waiting buses leaving the Kyiv region
Image source, UKRAINE SESThe SES said it used 28 buses tonight
Air raids sirens are sounding in multiple areas across western Ukraine this morning, say reports.
According to national news agency Ukrinform, sirens are sounding in the Rivne, Volyn, Lviv, Ternopil, and Ivano-Frankivsk regions.
Image source, Getty ImagesThe operator of 800 Burger King stores in Russia has "refused" to shut them, the fast food chain's owner says.
Restaurant Brands International said it had asked its local partner Alexander Kolobov to shut the shops following Russia's invasion of Ukraine.
"He has refused to do so," president David Shear said in a letter to staff, external.
Mr Shear said the company was in the midst of unwinding its 15% stake in the business.
Burger King is among a small number of Western brands that are finding it difficult to leave the market because of "complicated" contracts.