Ukrainian natural gas production facilities were damaged in a Russian attack on Ukraine's central Poltava region overnight, the state-run oil and gas firm Naftogaz and Energy Minister German Galushchenko said on Tuesday.

In December, Ukrainian drones targeted oil depots and refineries in Smolensk, Oryol, Bryansk and Rostov — an area that had previously been targeted in July. The General Staff of Ukraine’s Armed Forces claimed that the July attack on the Rostov refinery destroyed 1.5 million tons of oil and oil products worth $540 million (£433m).

Drones and missile attacks have repeatedly targeted oil refineries, as well as sites belonging to the military-industrial complex.

Ukrainian natural gas production facilities were damaged in a Russian attack on Ukraine's central Poltava region overnight, the state-run oil and gas firm Naftogaz and Energy Minister German Galushchenko said on Tuesday.

The bombardment took place as Ukrainian President Volodymyr Zelensky is heading to the Munich Security Conference, where he is expected to meet with top U.S. officials.

Ukraine imposed emergency power restrictions on Tuesday after overnight and morning attacks by Russia on gas infrastructure, said Ukraine Energy Minister German Galushchenko. "The enemy launched an attack on gas infrastructure overnight,

As a result of the attack, Ukraine imposed emergency power restrictions on Tuesday, according to Ukraine energy minister German Galushchenko. "The enemy launched an attack on gas infrastructure overnight,

The attack, which included strikes on gas infrastructure overnight and continued into the morning, has further strained Ukraine's energy grid.