Luo Lin, director of the State Administration of Work Safety, checks a rescued miner yesterday as Zhao Tiechui (right), head of China's watchdog for coal mine industry safety, and Zhang Baoshun, Party chief of Shanxi Province, look on in Gujiao City in north China's Shanxi Province. A blast hit a coal mine in Gujiao yesterday morning, killing at least 74 people and leaving 114 others injured. Of those in hospital, five are in a critical condition.