A Bosnian Croat man shot and killed six of his relatives in a village near the northern Bosnian town of Tuzla on Thursday, gunning down three in their homes and three aboard a bus, Reuters quoted the police as saying. Local people identified the man as 45-year-old Tomislav Petrovic and said all the victims were related to him and lived in the neighbourhood. "The man has been arrested and an investigation is under way," said Tuzla police spokesman Izudin Saric, adding the victims were three men and three women. "His motives are not clear," he said.