The strikes, which were the latest in Russia’s almost daily attacks on the Ukrainian power grid as bitter winter temperatures approach, killed at least six people, including a 7-year-old girl, according to authorities. Children between 2 and 16 years of age were among the 18 injured.

Russian forces are close to taking the eastern Ukrainian city of Pokrovsk after a pincer movement almost totally encircled it while small groups of highly mobile Russian units penetrated the city, according to Russian military bloggers.