"As a result of mass shelling by the occupiers of Kharkiv, 6 people died and 31 were injured," the office said on its Telegram channel.

Read here Chasiv Yar: at least 15 people have been killed after a Russian strike

Fragments of a rocket from a "Uragan" multi-launch rocket system have been found at the scene of the damage, he added.

Two of the dead were a father and his 17-year-old son whose car took a direct hit, he said. They were on their way to pick up a certificate for the teenager's university entrance.