At least four people died and 15 were injured after Russia struck Ukraine's capital city Kyiv with ballistic missiles on Saturday morning, according to officials.

In a post on his Telegram account, Kyiv Mayor Vitaly Klitschko said that several people were trapped in a damaged residential building during the attack.

The first and second floors of the building had partially collapsed, he said, while some warehouses in the city were also on fire.

Kyiv's military administration, meanwhile, said four people had died as a result of the Russian overnight attacks on the city.Russia regularly hits residential buildings, despite claiming only to target military sitesImage: Gleb Garanich/REUTERS

Reuters news agency cited witnesses in Kyiv who reported more than a dozen explosions shaking the Ukrainian capital.