The owner of a gypsum mine in China's eastern Shandong province has killed himself, as rescuers try to reach 17 miners who have been trapped for two days, state media report.
One person died and four miners escaped when the mine collapsed on Friday.
Since then, rescue workers have managed to pull a number of miners to safety.
China has a long history of industrial accidents. The latest incident comes days after a deadly landslide caused by construction waste in southern China.
Ma Congbo, the chairman of Yurong company which owns the mine, drowned himself by jumping into a mine well early on Sunday, China's Xinhua news agency reports.
His motive is not clear but the Chinese authorities have toughened the punishment of employers who are negligent, says the BBC's Stephen Evans in Beijing.
Sign up for our free e-mail list to see future vaticancatholic.com videos and articles.