A gas explosion at a coal mine in China's Shanxi province has killed at least 90 people. Official news agency Xinhua reported Saturday that the accident at Changzhi city's Liushenyu coal mine happened Friday evening. Around 247 workers were on duty at the time. Nine remained trapped as of Saturday afternoon and more than 120 were hospitalized. The cause of the explosion is under investigation, and rescue efforts continue. Many of the injured were affected by toxic gas, according to state media CCTV. Chinese President Xi Jinping has called for a full rescue effort and investigation to hold those responsible accountable.