Image source, Reuters

Ukraine must be provided with a "significant increase" in weapons in order to have a peaceful negotiated solution with Russia, Nato Secretary-General Jens Stoltenberg has said.

Stoltenberg describes the war as being at a pivotal moment and says Ukraine needs more air defence systems, armour but also ammunition, spare parts and maintenance to ensure the delivered weapons work.

"President Putin has shown no sign of preparing for peace and therefore he must realise he cannot win on battlefield," he told Reuters news agency at the World Economic Forum in Davos.

"If we want a negotiated peaceful solution tomorrow we need to provide more weapons today," Stoltenberg adds.

He has also said consultations are ongoing between allies on supplying battle tanks to Ukraine.

Image source, EPA

Ukraine has launched an investigation into the cause of the helicopter crash in the town of Brovary, east of Kyiv, but it could take weeks before we have any answers.

The BBC has been piecing together what we know in the immediate aftermath of the disaster.

Was the helicopter under attack?

An analysis of images of the crash site by the BBC has not revealed any evidence of missile debris and Ukrainian officials have made no mention of any missile fire - but a Ukrainian Air Force spokesman has said it's too early to talk about the causes.

What were the conditions before the crash?

The helicopter crashed at about 08:20 local time (06:20 GMT), just half an hour after sunrise, according to officials. Several videos show cloudy and misty conditions.

What do we know about the helicopter?

Ukrainian officials say the helicopter was a Eurocopter EC225 Super Puma used by the State Emergency Service of Ukraine. Red and white debris matching images of these helicopters can be seen in photos of the crash site.

This is not a military helicopter used in combat and it's often used to transport members of the Ukrainian government.

• Read more: Ukraine helicopter crash: What we know so far

Image source, Getty Images / MFA

Here's a bit more about two of those killed in the helicopter crash in Brovary.

Interior Minister Denys Monastyrsky was a prominent member of Ukrainian President Volodymy Zelensky's cabinet. The 42-year-old played a key role in updating the public on casualties caused by Russian missile strikes since Ukraine was first invaded in February.

He first took office in July 2021 but had worked as a lawyer before entering politics.

Monastyrsky is the highest profile Ukrainian casualty since Russia's war began - but there is no indication that the cause of the crash was anything more than an accident.

His deputy Yevhen Yenin became the interior minister's first deputy in 2021 having previously worked as Ukraine's foreign affairs minister.

Before he moved to the interior ministry, Yenin helped represent Ukraine's government abroad.

Officials have said both were on their way to a war "hot spot" when the helicopter crashed.

• Read more: Ukraine's interior ministry leadership killed in helicopter crash

A video released by Ukraine's national police shows blades from the crashed helicopter embedded into a residential building.

Debris from the crash is also seen scattered around a nearby playground.

Image source, Reuters

German Chancellor Olaf Scholz says in order for the war in Ukraine to end Russia's aggression must fail. But he makes no comment about suppling extra weapons to Ukraine.

There has been rising pressure on Scholz to authorise the export of heavy German-made Leopard tanks to Ukraine, although his government is thought to be waiting until later this week to announce any decision on this.

In an address to delegates at the World Economic Forum in Davos, Scholz says Germany's energy supply for this winter is secure, highlighting the ability of Europe's largest economy to wean itself off Russian gas.

"We will use our market power to ensure that European gas prices do not decouple completely from the world market."

Image source, Reuters

French President Emmanuel Macron has said he is saddened by the death of Ukraine's Interior Minister Denys Monastyrsky.

He offered condolences to Ukraine, saying his thoughts are with the victims and their families.

"France offers its condolences to its Ukrainian friends," he has said on Twitter., external

Canadian Prime Minister Justin Trudeau is also among those to have sent condolences to Ukraine, saying "the news of the helicopter crash in Brovary is incredibly tragic".

"I’m wishing a fast and full recovery to the injured. Canada continues to stand with Ukraine," he tweeted., external

Berlin's "hesitation" on sending tanks to Ukraine has "allowed Putin to escalate the war without consequences", the former secretary-general of Nato said.

Anders Fogh Rasmussen said he doesn't "see any logical argument" for Germany's reluctance to send tanks or allow other European nations to do the same.

He told Radio 4's World at One programme: "We should not be giving Putin time to come up with new cruel strategies. So we must force the Russians into the defensive."

Image source, SERGEY DOLZHENKO/EPA-EFE/REX/Shutterstock

Three key figures in Ukraine's interior ministry have been killed in a helicopter crash next to a kindergarten in Brovary, east of Ukraine's capital Kyiv.

If you're just joining us or need a recap, here's what we know so far:

• Interior Minister Denys Monastyrsky has died alongside his first deputy and state secretary
• The death toll has been revised down to 14 people, with the latest official figures saying this number includes one child and also nine people on board the helicopter
• Officials say the search and rescue operation is now complete
• Ukraine's President Zelensky has called it a "black morning"

• Ukrainian National Police chief Ihor Klymenko has been appointed acting interior minister, Ukraine's PM has announced
• People have been leaving tributes at the site and witnesses say they could hear panic when the crash happened
• Officials in the helicopter were travelling to the eastern city of Kharkiv when it crashed, the head of police in Kharkiv has said
• Ukrainian PM Denys Shmyhal has ordered a special committee be set up to investigate the cause of the crash

Stick with us as we bring you the latest.

Image source, Reuters

Search and rescue operations at the site of the helicopter crash is now complete, Ukraine's emergencies service DSNS says.

The death toll stands at 14 dead including one child.

In addition, 25 people, including 11 children, were injured in the crash.

Image source, GIAN EHRENZELLER/EPA-EFE/REX/Shutterstock

The mayor of Ukraine's capital Kyiv has responded to this morning's helicopter crash offering his condolences to the victims, their families and the residents of Brovary.

Ukraine is paying with the "lives of its citizens every day because of Russia's barbaric aggression", said Vitali Klitschko.

Posting on messaging app Telegram, the mayor said: "Today's tragedy - is yet another horrible event in this war."

He adds that no Ukrainians will feel safe on their land until the last Russian "leaves it".

Mourners have started leaving tributes at the site of this morning's helicopter crash.

People have been putting flowers and toys near the nursery in the town of Brovary, east of Ukraine's capital Kyiv.

Image source, Reuters

Image source, SERGEI SUPINSKY/AFP via Getty Images

Image source, Reuters

The Brovary death toll has also been revised down again in the last few moments.

According to the Ukrainian emergencies service DSNS as of 13:00 GMT:

• 14 have died, including one child and nine people on board the helicopter
• 25 people are injured, including 11 children

In the last few moments Ukrainian National Police chief Ihor Klymenko has been appointed acting interior minister, Prime Minister Denys Shmyhal has announced.

Hanna Chornous
Reporting from Kyiv

Image source, Hanna Chornous/BBC

A witness who was near the scene of the helicopter crash in Ukraine's capital Kyiv this morning has spoken about how parents were screaming and panicking when they heard an explosion.

“Everybody heard an explosion and we realised something bad happened,” said Lidiya, a local volunteer.

She hurried to the scene with others to help.

“Parents were running, screaming. There was panic."

Image source, Hanna Chornous/BBC

Another witness has told the BBC the first responders and locals rushed to save children from the nursery through the windows.

Local resident Dmytro has said he first thought the crash outside of his window was a Russian drone.

Image source, Hanna Chornous/BBC

Lyubov was on her way to a kindergarten, where she works as an arts teacher, when she heard a bang, roar and then a loud crash.

“There was a fog and a helicopter dived out of it,” she said.

She said children received burns and at least two of her colleagues were injured.

Let's now take a look at the latest military intelligence from Ukraine.

Just last week, Russia claimed victory over the Donbas town of Soledar but Ukrainian officials said the fight for the city was still going on.

However, the latest UK Ministry of Defence intelligence update says it is "highly likely" Ukrainian forces withdrew their troops from the Donbas town of Soledar by the end of Monday.

This has left "Russian military and Wagner Group proxy forces in control," as a result, the MoD adds.

Analysis from the MoD suggests Russia's advance on Soledar was largely due to Wagner forces and was part of an operation aimed at eventually enclosing Bakhmut.

The strategic significance of Soledar is disputed by military analysts but if Russia succeeds in establishing full control over the town it would be a symbolic victory for the Kremlin.

Ukraine's first lady Olena Zelenksy - the wife of President Zelensky - has described the helicopter crash as a "horrible day" for Ukraine.

She has said the biggest tragedy is the death of children.

"They have faith that we, as adults, are able to protect them," she adds.

Ukraine's Prime Minister Denys Shmyhal has added his voice to those reacting to today's helicopter crash near Ukraine's capital Kyiv.

In a tweet in Ukrainian, Shmyhal expressed his condolences to the families of all the victims.

He added pictures of fellow government officials that died in the crash to his post - including Interior Minister Denys Monastrysky, his deputy Yevhen Yenin and the ministry's state secretary Yurii Lubkovich.

"A great loss," Shmyhal adds.

The BBC's Ukraine correspondent James Waterhouse has been at the scene of the helicopter crash near Kyiv.

He explains the process of reporting a story like this - and the dangerous low-altitide helicopter trips that Ukrainian officials regularly take.

The cause of the crash is still being investigated.

Some more information about the helicopter from the state emergency service that went down this morning.

The helicopter was a DSNS EC-225 model and officials say it was repeatedly involved in transporting personnel to crisis areas.

A statement says the crew were prepared to "perform tasks under difficult conditions" and had "the required number of hours of flight" needed to pilot this specific helicopter.

Nick Beake
Europe correspondent

A day after Russia’s deadly missile attack on a shopping centre in Kremenchuk in central Ukraine last June, our BBC team took refuge in the city during another air raid siren, external.

We hurried down the steps of the shelter and found ourselves surrounded by elderly women with cats, local shop workers, and police - as well as Ukraine’s Interior Minister Denys Monastyrsky and his team.

This brutal war was a leveller.

Monastyrsky looked exhausted, his face drained of colour – but he mustered a faint smile when I asked him when and how his country’s misery could finally end.

“I think it should be with Putin’s death. By our efforts or the efforts of the Russian people.”

And do you think Putin’s death will be soon? I replied.

“I hope it.”

We had arrived in Kremenchuk the previous night after managing to get a lift in a helicopter with the Ukrainian police force from Kyiv.

As we darted across the golden fields of central Ukraine we dropped to just 10 metres above the ground.

The pilot calmly explained it was to avoid any Russian missiles.

My cameraman Matt and I had originally expected to share the flight with the interior minister, but his plans changed at the last minute.

Our 90-minute journey that evening took place in clear skies with slowly dimming sunlight – unlike the dense morning fog that enveloped Kyiv this morning on the minister’s final fatal flight.