Two miners were confirmed dead and 10 others injured after an explosion in a coal mine in northwest China's Ningxia Hui Autonomous Region early Saturday, local authorities said. The explosion happened at around 2:30 a.m. at Hongyuan Coal Mine at Shikong Town of Zhongning County. A total of 12 people were trapped underground, Xinhua quoted the regional coal mine safety supervision authorities as saying. The injured miners have been sent to local hospitals for treatment. Their conditions were not immediately known. The township-owned coal mine has been ordered to suspend operation for a safety overhaul, when the accident happened, according to the regional coal mine safety supervision authorities. An initial investigation showed that the explosion was triggered by burning explosives.