Orisavac - Bosnian Muslim investigators said yesterday they had found a mass grave containing bodies from a group of 19 people thought to have been killed by Serb forces early in the 1992-95 war. The group of 19 victims were from Lakat village in the Nevesinnje municipality, where the remains of some 200 out of 260 of Muslims killed in the war have already been exhumed.