The investigation comes after complaints about offensive chants against two Swiss players who have ethnic Albanian roots and family ties to Kosovo
Hashim Thaci faces charges of committing war crimes and crimes against humanity
No single party is likely to win the vote on its own
In February, Skopje signed a protocol that could see the former Yugoslav republic become the alliance's 30th member if the move is ratified by all 29 NATO allies
Protesters used cars and trucks to block the main road between city of Mitrovica and the village of Banja, which Aleksandar Vucic was scheduled to visit
