Two senior officials respectively in charge of work safety and coal mine safety left Beijing Wednesday evening for the site of a coal mine blast in north China's Hebei Province.

Li Yizhong, director of the State Administration of Work Safety, and Zhao Tiechui, director of the State Administration of Coal Mine Safety, were in a 14-member team to direct rescue efforts on the blast site.

Xinhua reporter at the accident site in Liuguantun Colliery in Kaiping District of Tangshan verified that 186 miners were working underground when the blast occurred at 3:30 p.m. Wednesday.

Rescuers have salvaged 110 miners from the exploded mine. There were still 22 workers missing.

The coal mine used to be a state-owned mine run by the local government with a designed production capacity of 300,000 tons per year. In 2002, it was transformed into a private mine with an annual capacity of 150,000 tons.

It is said to be a low-gas coal mine, according to a report from the provincial administration of coal mine safety.

Source: Xinhua