U.N. INVESTIGATION CONFIRMS SERB ATTACK ON SARAJEVO

SARAJEVO, April 13 (Hina) - UN special envoy Yasushi Akashi is to arrive in Bosnia-Herzegovina on April 19 or 20, the UN in Sarajevo said today. UN spokesman Gary Coward said that Akashi would try to win an extension of the ceasefire agreement in Bosnia, if such a thing was at all possible under current circumstances. Coward rejected accusations from a letter Bosnian Serb military commander Ratko Mladic had forwarded to UN Force commander in Bosnia Rupert Smith. The UN established that Serb forces had attacked Sarajevo from their positions on Spicasta Stijena two days ago, Coward said, stressing that relations between the UN Protection Force and Bosnian Serbs were at a very low level. Mladic claimed in the letter that Serbs had not attacked Sarajevo and blamed UNPROFOR for the escalation of the situation in Bosnia. Sarajevo airport remained closed as Serbs refused to guarantee safety to humanitarian aircraft. Serbs also denied passage to 18 UN convoys, four of which were to have delivered fuel supplies to UN personnel. (hina) mm vm 131354 MET apr 95