Three people including a 12-year-old boy were killed in Russian attacks on eastern Ukraine, where Russian forces have claimed steady advances in recent weeks, local authorities said Monday. The head of the Donetsk region, which the Kremlin claimed to have annexed in late 2022, said two people were killed and another wounded by Russian attacks on the village of Mykhaylivka. “A 12-year-old boy is among the dead,” the official, Vadym Filashkin, announced on social media, describing two aerial attacks 30 minutes apart that left several homes damaged. Separately, one person was killed and two other…