A gas explosion at a mine killed 23 people in northeast China on Thursday, local authorities and state media said. The official Xinhua News Agency said the morning accident occurred in a coal mine in Fuxin, a city in Liaoning province. Rescuers were searching for four other miners who were trapped in the mine, Xinhua said, citing local authorities. A spokesman at the Fuxin safety bureau confirmed that the explosion occurred early Thursday but would not provide further details.