BBC: Sounds of war get closer in Kyiv, with series of explosions about five minutes apart

Kyiv has been under a curfew imposed by mayor Vitali Klitschko since 17:00 local time (15:00 GMT) - he tweeted that any civilian found on the street after that time "will be considered members of the enemy's sabotage and reconnaissance groups".

UK defence officials say that Russian troops have advanced within 30 km (19 miles) of the city.

But President Volodymyr Zelensky remains in the city and has been issuing defiant messages from his office and with troops.

The sounds of war seem to get ever closer in Kyiv, with a series of explosions about five minutes apart.

Russian forces are still on edge of city, trying to advance mainly from northern and easterly directions but they are still meeting resistance from Ukrainian forces.