In south-western china, 30 people were killed and 101 miners rescue after an illegal mining perform triggered a blast that tear during a coal mine officials said.

On Saturday, when 131 miners were working underground, 30 miners were killed when colliery gas burst in Tonghua coal mine in Qijiang County in Chongqing municipality.

The official Xinhua news agency reported that 101 miners were rescued. 59 miners were injured of the rescued, together with four in serious condition, it said.

The mine accident is happen by an illegal practice which violated the mining rules, said Luo Lin, chief of the State Administration of Work Safety.

Luo said the Cabinet will set up a special investigation team to check out the coal mine explosion.

An extreme amount of explosives directly triggered the accident, said Zhao Tiechui, head of the State Administration of Coal Mine Safety.

The mine's managers didn't abandon workers in time, said Zhao. Police have held three people including the coal mine's owner, chief engineer and project manager in link with the accident.

China's coal mines are thought the world's most dangerous. Official figures illustrate that over 3,200 miners killed last year but the actual figures are much more than that as several such accidents are covered up.