A coal mining accident in Sichuan on Saturday has left 28 people trapped underground, the Wall Street Journal reported. Local media said that 41 workers were in the mine doing safety work to expand the mine’s capacity from 50,000 to 60,0000 tons when an estimated 4,000 cubic meters of water flooded the mine. Officials are unsure what exactly caused the flooding, and pumps were being brought to the mine for rescue efforts. China, which uses coal to produce 70% of its energy consumption, is the world’s deadliest country for mine accidents – some 2,600 people died last year alone. While the total number of fatalities has dropped sharply in past years, top government officials, particularly Premier Wen Jiabao, have recently pushed for greater mine safety.