We are investigating what actually happened, Elshani said, adding that it appeared that an explosive device had been planted under one of the cars.
Serb and Albanian representatives will meet in Vienna on Wednesday for final talks on the UN plan for Kosovo presented earlier this month. Clashes between police and a group of Kosovo Albanians on February 10, the fiercest since March 2004, claimed the lives of two protesters.
Prime Minister Agim Ceku, who visited the scene of the explosion, condemned the incident, adding that such activities only added grist to the mill of opponents of Kosovo's independence.