In China, eighteen workers were killed in a coal mine accident in Hunan Province. As many as 55 people were working in the mining shaft when a gas leak took place at the Jilinqiao colliery in Huangfengqiao Township, Youxian County yesterday. State-run Xinhua news agency said, the rescuers brought the remaining 37 miners to safety and rushed them to hospital. <br/><br/>Investigators are still testing substances in the poisonous gas. Police have detained those responsible for accident pending investigation.<br/>China is the world's largest coal producer, witnesses frequent deadly accidents in mines.In March, seventeen coal miners were killed when a lift used to move workers fell down a shaft in northeastern Heilongjiang province.