   Croatians shell Muslims in Mostar  SARAJEVO - Croatian forces
unleashed a heavy mortar barrage on Muslim fighters and
civilians trapped in the southern Bosnian city of Mostar, a UN
spokesman said yesterday. At least 46 Croatian mortar bombs hit
the encircled Muslim sector of the city during the night as
fighting increased between the former allies in the war against
Bosnian Serbs. The UN also reported fighting between Muslims and
Croats around Novi Travnik and Gornji Vakuf in central Bosnia-
Herzegovina. Reuter