Reuters THE HAGUE -- Wednesday -- A retired Yugoslav vice admiral pleaded guilty at The Hague tribunal on Wednesday to killing civilians by shelling the Croatian city of Dubrovnik in 1991 during Croatia's war of independence against Serbia. Miodrag Jokic, who in 2001 pleaded not guilty to nine counts of violating the laws and customs of war, changed his plea to guilty on six counts after the indictment against him was amended by prosecutors at the United Nations court. Jokic admitted murder, cruel treatment and attacks on civilians and destruction of civilian and historic buildings during shelling of the historic heart of Dubrovnik on December 6, 1991. Two civilians died and three were wounded. "Your honours, I am guilty," Jokic told judges. The original indictment included charges related to several other shelling incidents. Jokic was one of three former members of the Yugoslav military charged with responsibility for civilian deaths during the shelling of Dubrovnik, a UNESCO World Heritage site considered one of the world's most beautiful cities. The three senior Yugoslav Peoples' Army (JNA) commanders were charged with killing and wounding civilians in Dubrovnik when its land and naval units pounded the city with shells in 1991.