Ukraine sharply increased electricity imports and halted exports on Sunday after a series of missile and drone strikes on the country’s power system, the Ministry of Energy said, according to Reuters.

“For the current day, the import of electricity is forecast at the level of 14,900 megawatt-hours (MWh). Export is not planned,” the ministry said in a statement.

Previously, in similar situations, Ukraine imported electricity from neighboring countries. As recently as Friday, it received emergency aid from Romania, Poland and Slovakia after Russian attacks left a million customers without power.

Russia launched 150 missiles and drones overnight Thursday into Friday, and the head of Ukraine’s state energy company said it was the biggest attack on energy infrastructure in the entire war. In this regard, there were significant power outages in many regions.

The day before the attack on March 22, Ukraine imported 3,300 MWh, and exported 2,148 MWh.

Energy facilities in three regions of Ukraine were also attacked on Sunday morning.

The agency reported that the Russians tried to strike a critical energy infrastructure facility in the Lviv region.

“The equipment caught fire, the plant was cut off. No loss was recorded. Consequences are being established,” the department informed.

He stated that as a result, power lines in the Kyiv region were damaged, and 1,400 households in two settlements were left without electricity.