AlQa'dah 17, 1432, Oct 15, 2011, SPA -- Rescuers said on Saturday they had found no sign of life four days after 13 miners were trapped under a flooded coal mine in northeast China's Heilongjiang Province. Efforts to pump water out of the mine continued, though the prime time for rescue efforts had passed, according to Peng Jianxun, deputy head of the State Administration of Coal Mine Safety (SACMS). The cause of the accident is still under investigation, and it is still unknown how many hours it would take to drain the mine, Xinhua reported.