Two miners trapped underground for 10 days in a flooded coal mine have been rescued, China’s state-run CCTV reported.

But the bodies of 10 others have also been found.

The accident September 28 occurred when 42 miners were working in the Zhengsheng coal mine in northern China’s Shanxi province, according to CCTV. Thirty workers were pulled out of the shaft immediately after the accident.

More than 850 rescuers, 20 pumps and four drilling machines embarked on the rescue operation, CCTV said.

The cause of the accident is under investigation.