In this photo provided by China’s Xinhua News Agency, rescuers head to examine the fire conditions at Xiaonangou coal mine at Sangshuping Township of Hancheng City, northwest China’s Shaanxi Province, on Sunday, July 18, 2010. An electrical fire inside the coal shaft in northern China left 28 miners dead, a government official said Sunday. (AP Photo/Xinhua, Liu Xiao)

There’s bad news again out of the coalfields of China, where 28 workers were killed and 13 trapped in separate incidents.

In one incident, 28 miners were killed in an underground fire in northwest China’s Shaanxi Province Saturday. In the other, two bodies have been recovered and 11 miners remain unaccounted for after a mine flooded in northwest China’s Gansu Provinc.

Meanwhile, Chinese police have arrested 8 people after a violent clash outside a coal mine in north China that media said left dozens injured, highlighting the country’s festering problems of corruption and land ownership disputes.