premise: Seven miners have been killed and seven more are missing after a coal mine flooded in north China's Hebei province. The Xinhua news agency reports the latest coal mine disaster occurred around 5:00 a.m. on Saturday in Xingtai City.A reason for the accident has not yet been given. Owners of the coal mine have been detained by local police and the investigation into the cause of the flooding is underway. State media reports say the disaster occurred at a pit in Xingtai City, but gave few other details.
hypothesis: A coal mine accident killed more than 73 people in China.