Explosions were reported in Kharkiv, Dnipro, and Kremenchuk the morning of Dec. 25, as Russia launched a mass aerial attack against cities across Ukraine. At least one civilian was hospitalized.

Kyiv on Saturday staged a major drone attack on the Russian city of Kazan, 1,000 kilometres (620 miles) from the frontier, the latest in a series of escalating aerial attacks in the nearly three-year conflict.