Rescuers are attempting to find seven workers trapped underground after a coal mine was flooded Thursday in northeast China.

The flooding occurred at around 3:30 PM at the privately-owned Guoming mine, in Baoqing county, Shuangyashan City, Heilongjiang Province, a city official said Friday.

The circumstances of the trapped workers were unknown, said the official.

Work safety officials were investigating the cause of the accident.

(Xinhua News Agency November 13, 2009)