Six people, including one child, were killed on Friday in a Ukrainian missile attack on the town of Rylsk in Russia's Kursk region, the acting governor, Alexander Khinshtein, said.

The strikes ignited fires at the Kadamovsky range, a crucial training site for Russian troops heading into Ukraine.

Explosions were reported in Kharkiv, Dnipro, and other cities the morning of Dec. 25, as Russia launched a mass aerial attack across Ukraine. At least two civilians were hospitalized.