Kosovo Serbs and country’s police exchanged gunfire on Saturday after a flareup of tensions in the volatile northern part of the country, said Reuters.Earlier in the day Serbs from Kosovo’s north blocked main roads in the region to protest against the arrest of a former member of the Kosovo police who quit his post last month along with other ethnic Serbs.With a crisis mounting in the majority Serb north, Kosovo’s president Vjosa Osmani on Saturday announced that local elections in that area would be delayed until April 23.Police said the blockade halted traffic and they were forced to close two border crossings between Kosovo and Serbia.Serb mayors in northern Kosovo municipalities, along with local judges and some 600 police officers, resigned last month in protest over a government decision to replace Belgrade-issued car license plates with ones issued by Pristina."