The attack - which reportedly consisted of more than 70 missiles and 450 drones - comes after a so-called "energy truce" expired at the weekend.

Hundreds of drones and missiles struck Kyiv and Kharkiv overnight, leaving thousands of homes without heat.

The attack - which reportedly consisted of more than 70 missiles and 450 drones - comes after a so-called "energy truce" expired at the weekend.