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 Balkan nations.The explosion late Friday punched a hole in a canal providing water to hundreds of thousands of people and the cooling systems at two coal-fired power plants that generate most of Kosovo's electricity.

Serbian President Aleksandar Vucic on Sunday denied that Belgrade had masterminded a strike on Kosovar infrastructure, saying Kosovo itself had mounted a "hybrid attack" against his country. Serbia's Vucic fired back in an address to the nation on Sunday,

Kosovo and Serbia continued to sling allegations at each other on Sunday, just days after an explosion targeting a strategic canal in Kosovo sent tensions soaring between the long-time rivals.