President Volodymyr Zelensky spoke out after dozens of civilians were reportedly killed in Kharkiv.

Ros Atkins looks at the history of nuclear tensions and deals between the US and Russia.

The moves come as major corporations cut business links with Russia after its invasion of Ukraine.

Canadian Prime Minister Justin Trudeau said the move would send a "powerful message".

Hundreds of casualties are reported as major cities remain under attack from Russian forces.

"Would never do" isn't a phrase that applies to Vladimir Putin, the BBC's Steve Rosenberg believes.

Burning buildings and cars destroyed in Donetsk after the separatist-controlled city is shelled.

Ukraine says more than 200 civilians have been killed. Children have been caught up in the violence.

The EU is sending arms to Ukraine and banning Russian flights. Here's what you need to know after Day Four of the war.

Russian planes will now be unable to land in, take off from or fly over any EU nation.

Germany's new chancellor announces a massive increase in military spending as anti-war crowds gather.

Local officials say the city, home to 1.4 million, is now rid of Russian troops after fierce clashes.

The president blames "unfriendly" Western actions following Russia's invasion of Ukraine.

Norwegian energy giant Equinor also says it will start to divest its joint ventures in Russia.

On the Polish border, the BBC meets women whose families had to split because of the war.

Russia launched its attack on Thursday and large numbers of troops are now close to the capital Kyiv.

What you should know about the reasons given for Russia's military assault on Ukraine.

Western nations are debating how far they should support a possible Ukrainian insurgency.

Ukraine's president had no experience of politics when when elected in 2019, but has emerged as a convincing war leader.

Some Russian banks will be banned from the Swift financial network but what impact will this have?

Patriotic Ukrainians know they will face Russian soldiers soon - and are preparing for the day.

The gloves are off - so what might happen next? What can the West do to deter Vladimir Putin?

The Dane will become the first Premier League player to appear with an ICD fitted, on Saturday.

Video show a strike targeting government offices in central Kharkiv, Ukraine.

Dozens of people have been killed in Russian missile strikes on Kharkiv, Ukrainian officials say.

Videos from social media show tanks retreating and locals telling soldiers to go back to Russia.

Liza Grach emotionally recounts escaping to Germany with her child - but without her husband.

The EU says it will begin shipping arms to Ukraine, the first time it has done so in a conflict.