Suspected Muslim separatists detonated a bomb in southern Thailand on Sunday, killing two police officers and wounding three other people. The device, believed to have been triggered by a mobile phone, exploded in a small storehouse used by a village chief in the Sungai Kolok district of Narathiwat province and caused damage in a 30-meter (98-foot) radius, said police Lt. Sittidej Ruansong. Two police officers were killed, while another officer and two villagers were wounded in the blast near a border police station and a market along the Malaysian frontier, he said. The attack came after Thailand's revered Queen Sirikit delivered a televised address late Saturday calling on the public to unite against the ongoing violence in the southernmost provinces. "We have to condemn such actions as being totally devoid of humanity," the queen was quoted as saying by the Bangkok Post.