On Easter Sunday, 31 March 1991, the first fatal clashes occurred when Croatian police from the Croatian Ministry of the Interior (MUP) entered the Plitvice Lakes national park to expel rebel Serb forces. Serb paramilitaries ambushed a bus carrying Croatian police into the national park on the road north of Korenica, sparking a day-long gun battle between the two sides. During the fighting, two people, one Croat and one Serb policeman, were killed. Twenty other people were injured and twenty-nine Krajina Serb paramilitaries and policemen were taken prisoner by Croatian forces. Among the prisoners was Goran Hadžić, later to become the President of the Republic of Serbian Krajina.