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.

Kharkiv Mayor Igor Terekhov said in a statement that he believed ballistic missiles were used to attack the city.

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