Suspected separatist insurgents in Thailand's troubled Muslim-majority south shot dead four civilians while a remote-controlled bomb wounded five other people, police said Tuesday. Militants gunned down a Buddhist man and his wife in an ambush early Tuesday while they were travelling by motorbike to tap rubber in restive Pattani province, police said. As police investigated the shooting, rebels detonated a bomb hidden beneath the bodies of the couple, wounding three policemen and two villagers, they added. Also in Pattani a gunman posing as a wedding guest shot dead a Muslim man at a marriage ceremony on Monday evening, police said.