PRISTINA, Kosovo (AP) — A powerful explosion damaged a water canal and temporarily cut water and power supply to Kosovo’s cities, the prime minister said Saturday, blaming groups supported by Serbia.

Kosovo worked to shore up water and power supplies on Saturday and stepped up security at strategic sites after an explosion hit a canal that sends water to its two main power plants, an incident Pristina labeled a “terrorist act” by neighboring Serbia.

A blast on a canal vital to Kosovo's water and power supplies has sparked a war of words with Serbia, with fears it could further escalate tensions between the two

A police officer patrols near the damaged canal in northern Kosovo supplying water to two coal-fired power plants that generate nearly all of the country's electricity,in Varage, near Zubin Potok, Kosovo November 30,

Kosovo's Prime Minister Albin Kurti said on Saturday that police had made arrests after an explosion hit a canal that sends water to its two main power plants, an incident Pristina labelled a "terrorist act" by neighbouring Serbia.

Kosovo arrested several suspects Saturday after an explosion at a key canal feeding two of its main power plants, while neighbouring Serbia rejected accusations of staging the blast.