A gunman in Australia doused a kindergarten classroom near Melbourne with gasoline and held four children hostage Tuesday for seven hours before police arrested him, authorities said. The gunman, believed to be a Turkish migrant, was dragged from the schoolroom by police with blood streaming down his right cheek, officials said. The children, three boys and one girl, received minor bruises along with burns from gasoline fumes from the fuel the gunman spread about the classroom in Hawthorn, 5 miles from Melbourne.