Russia has carried out its largest air attack on Ukraine in months, launching 120 missiles and 90 drones that killed several people and caused severe damage to the power system, officials said.

“The enemy’s target was our energy infrastructure throughout Ukraine. Unfortunately, there is damage to objects from hits and falling debris,” Zelenskyy said in a statement on the Telegram messaging app.

A Russian drone attack on the southern Ukrainian city of Mykolaiv killed at least two people and wounded six others, including children, Zelenskyy said, adding that “all areas” were left without power.

Poland, a NATO member that borders Ukraine to the west, said it had scrambled its air force as a precaution.