. -- kuntsevo sent police to take control of the border post. that sparked clashes, leaving one officer dead. >> the border crossings have been closed and roads blocked. media reports of gunfire at one checkpoint. because of a police group tried to retake two border crossings after clashes with ethnic serbs. most of the residents here are ethnic serbs who do not recognize the costs of the government. behind the renewed tension is a conflictbetween serbia and kosovo, focused on trade and customs. serbia has blocked imports from cause of both since 2008, when it declared independence. costs about is now banning serbian goods from its territory -- kosovo is now banning serbian goods from its territory. prime minister thaci said this should not affect ethnic serbs living in the area. with the ban in place, they have no access to serbian goods. the international community has spoken out, appealing for calm. the commander of nato peacekeeping in kosovo has said his force would not tolerate an escalation of the violence. during talks with cosimo's prim