India, June 23 -- A Russian drone strike on the city of Sumy in northeastern Ukraine killed three members of the same family, including a 13-year-old boy and his father, and wounded another two, a regional official said on Monday.

Russia has pounded civilian areas of Ukraine with drones and missiles since it launched its all-out invasion of its neighbour more than four years ago, and a United Nations tally says more than 16,000 civilians have died in the war. US-led peace efforts have failed to stop the fighting.

The Sumy attack hit a home and killed a 36-year-old man, his 13-year-old son and a 73-year-old woman who was the mother of the man's partner, according to Oleh Hryhorov, the head of the regional military administration. The man...