By LORNE COOK
BRUSSELS (AP) — Kosovo’s president has accused Serbian investigators of dragging their feet over an inquiry into attacks on NATO peacekeepers. Dozens of troops and police officers were injured in the May clashes. Some of them had serious injuries. President Vjosa Osmani also wants European Union officials to refrain from showing any favoritism when they supervise talks next week aimed at improving Kosovo’s tense ties with Serbia. Osmani spoke Thursday after talks with NATO Secretary-General Jens Stoltenberg. She said video footage shows that some of those who attacked peacekeepers “are police officers who came all the way from Serbia.” Kosovo and Serbian leaders are meeting next week to try to ease tensions. Osmani is calling for “a balanced approach” from EU mediators.