Suspected separatist rebels opened fire on a family on Tuesday killing two young children and their father in the Muslim-majority south of Thailand, police said. The father, a 53-year-old fruit seller, was driving with his wife and two children in Narathiwat province when a gang believed to be militants attacked his pick-up truck, police in the region said. The father and daughter died at the scene, while the wife and five-year-old son were badly wounded. The boy later died in hospital, medical staff said.