An ethnic Serb enclave in Croatia said Monday it was seceding from the pro-Western republic to unilaterally join Serbia. The declaration by Krajina further increased tensions in Yugoslavia, where two people died in a weekend clash.

The decision by one of 13 Serbian-dominated enclaves, which have no border with Serbia, to annex itself to Serbia, Yugoslavia's largest and most populous republic, was announced at a rally by Krajina's president, Milan Babic, and broadcast by Belgrade radio.The secession announcement followed a clash Sunday between Croatian police and ethnic Serbs who were occupying Plitvice National Park. One of the Serbs and a Croatian policeman were killed.