An explosion on Friday damaged a canal supplying water to Kosovo’s two main coal-fired power plants, Prime Minister Albin Kurti said, blaming a “terrorist attack” by neighboring Serbia.

Axar.az reports that citng AFP, “This is a criminal and terrorist attack aimed at damaging our critical infrastructure,” Kurti told a press conference late Friday.

The blast, which hit a canal supplying water to cooling systems at two power plants that supply most of Kosovo’s electricity, occurred near the town of Zubin Potok in the country’s troubled north.

If the damage is not repaired, part of Kosovo could be without electricity as early as Saturday morning, the prime minister said.

He gave no details about the extent of the damage to the canal, which runs from the Serb-majority north of Kosovo to the capital, Pristina, and also supplies drinking water.