evidence: Kosovo Prime Minister Albin Kurti accused Serbia of sending the attackers into Kosovo. Serbian President Aleksandar Vucic denied that, saying the men were Kosovo Serbs who have had enough of "Kurti’s terror." [...] Kosovo is a mainly ethnic Albanian territory that was part of Serbia before it declared independence. The Serbian government has refused to recognize Kosovo’s statehood, even though it has no formal control there. [...] The dispute over Kosovo is centuries-old. Serbs cherish the area as central both to their religion and statehood. Numerous medieval Serb Orthodox Christian monasteries are in Kosovo, and Serb nationalists view a 1389 battle against Ottoman Turks there as a symbol of their national struggle for independence.