Four civilians have been killed and 10 others injured in Ukraine’s eastern city of Kharkiv, local officials said, as Russian forces stepped up their bombing campaign.

“The enemy is bombing residential homes, residential areas. Unfortunately, there are civilian casualties – the worst thing is that children are dying”, - Kharkiv mayor Ihor Terekhov told Ukrainian national television.

Kharkiv region Governor Oleh Synehubov later wrote on the Telegram messaging app that four people were killed and 10 wounded by attacks on the city.