The US president calls Russia's president a "dictator" and vows to punish him over the Ukraine invasion.

Missiles hit the the cultural heart of the city, targeting an opera house, concert hall and offices.

The companies join the growing list of global corporations to cut business links with Russia.

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

The changes were made following criticism that the UK isn't doing enough for people fleeing the war.

Members of the International Energy Agency agreed to release 60 million barrels of oil from stockpiles.

Elina Svitolina's match against Russia's Anastasia Potapova at the Monterrey Open on Tuesday will go ahead after the Ukrainian top seed was given assurances her opponent will compete under a neutral flag.

A look at Russia's nuclear arsenal and basic guide to nuclear weapons and their destructive power

Russia urges people to leave Kyiv before air strikes as its paratroopers land in second-city Kharkiv.

But Mikhail Fridman avoids criticising President Putin as it could be risky for himself and staff.

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

The EU says up to four million people may try to escape the war in Ukraine.

The UK is imposing further sanctions against Russian interests, but some think more should be done.

From an app to alert people to sirens, to organising supplies, tech firms are helping the war effort.

Russians are starting to feel the effect of sanctions aimed at punishing the country for invading Ukraine.

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

The Russian leader has always refused to back down in the past, says the BBC's John Simpson.

Ukraine has asked Western powers to consider imposing a no-fly zone to stop Russian air assaults.

What is a vacuum or thermobaric bomb and are they being used in the war in Ukraine?

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

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

Watch as a crowd in the north-eastern city of Kupiansk try to stop the vehicle from leaving.

Authorities say five people were killed in the Russian attack on the civilian-run tower in the capital.

Watch the moment diplomats in Geneva turned their backs on Sergey Lavrov as he spoke via video link.

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

Video show a deadly Russian strike in Ukraine's second city, Kharkiv.