NATO official warned on Saturday that ethnic tension in north Kosovo could trigger a repeat of violence seen in the area last year, when four people died in a gun battle and NATO officials were hurt.
Kosovo said on Saturday it had closed two border crossings with Serbia after protesters in Serbia partially blocked roads and turned back Kosovo passengers amid tensions in Kosovo's north.
British troops are patrolling the Kosovo-Serbia border as part of a NATO peacekeeping presence being bolstered amid concern that the former wartime foes could return to open conflict.
The main political party representing Serbs in northern Kosovo declared three days of mourning for people killed in a gunbattle with Kosovo police, after the worst violence for years.
The storming of a north Kosovo monastery has thrown attention on persistent trouble in the ethnic Serbian-majority region 15 years after Pristina declared independence.
Kosovo's Kurti accused the European Union mediator of siding with Serbia days after talks collapsed in Brussels with the EU blaming what it called Pristina's unwillingness to honour its commitment.
