Rescuers found two bodies in a flooded coal shaft in north-western China and 11 miners remained trapped on Monday, a reminder of the dangers of an industry that claimed the lives of 40 others in recent days.

More than 100 rescuers pumped water out of the mine shaft in Jinta, a county in Gansu province, which was under construction at the time, the official Xinhua News Agency said. Three miners were lifted to safety after water gushed into the mine on Sunday.

Calls to the local government rang unanswered on Monday.

Separately, an explosion late Sunday at a coal mine in north-eastern Liaoning province killed four workers and injured 13 others, who were in stable condition, Xinhua said.

On Saturday, 28 miners were killed when an electrical cable caught fire inside a coal shaft in northern Shaanxi province. There were no survivors. The fire happened at the privately owned Xiaonangou coal mine in Sangshuping town.

The coal mine’s owner, Guo Yungang, was detained by the police, Xinhua said. His company, Xinxin Mining Co. Ltd., tried to expand the mine in order to increase output from 30,000 tons to 90,000 tons. Rescuers retrieved the bodies of at least five miners and an investigation was under way.

In another accident on Saturday, eight workers died when a blaze engulfed a coal mine in central Henan province, Xinhua reported. The incident at a mine operated by the Zhengzhou Coal Industry Group was also being investigated.

The mining industry is rife with illegal practices, sometimes triggering violence. On Sunday, more than 100 villagers and 70 miners attacked each other with bricks and stones at a coal mine in Shaanxi province, Xinhua said.

The clash, set off by a dispute over the mine’s ownership, injured 87 people in Yulin city, Xinhua said. Villagers also smashed gates and other facilities in an attempt to force a halt in production at the mine, which employs 200 people, it said.

Authorities in Yulin detained eight people suspected of “masterminding” the clash, Xinhua said. Calls to the Yulin city government rang unanswered on Monday.

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