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.

A week-long pause in strikes on Ukraine amid peace talks came to an abrupt end after Russian forces unleashed a massive drone and missile assault.