Overnight Russian air strikes have killed at least four people, including three young children in Ukraine's north-eastern Kharkiv region, local officials have said, BBC reported. 

Regional head Oleh Synegubov said two boys, both aged two, a one-year-old girl and a 34-year-old man died after a drone hit their house in the town of Bohodukhiv.

A 35-year-old pregnant woman and another woman, 73, were injured in the strike on the town, Synegubov said, according to BBC.