Chongqing police yesterday detained three people after excessive explosives triggered a mine accident that left 30 dead and 77 injured.

"The State Council has set up a special investigation team to look into the explosion," said Liu Guangcai, deputy director of Chongqing Supervision and Management Administration of Work Safety, yesterday.

Detained were the mine owner, the project manager and a chief engineer, local government spokesman Wen Tianping said yesterday.

He also said two managers were relieved from their posts for investigation.

The explosion occurred around 11 am on Saturday at Tonghua Coal Mine in Anwen town of Qijiang county, when 131 miners were working about 1,000 m underground.

Zhu Chuan, vice head of Qijiang, said yesterday the identities of the 30 victims had been verified and arrangements had been made for their family members to stay in 30 separate hostels.

"We arranged 30 teams of people to comfort them and provided 30 cars for their activities," Zhu said.

He made the remarks in response to earlier reports that family members were too emotional to control themselves while they were waiting for a list of the dead.

Of the 101 rescued miners, 77 injured had been sent to three local hospitals and one first-aid center.

Three miners remained in critical condition and seven were in serious condition, he said.

Wen Caijin, an official with the Chongqing Energy Investment Group, was quoted by chinanews.com.cn yesterday saying the company will observe regulations to give victims' families economic compensation.

Compensation would be at least 200,000 yuan ($29,000) per victim, it reported, without revealing more information on how the compensation would be calculated.

The Tonghua Coal Mine, with a history of more than 50 years, is affiliated to the State-owned Songzao Mining Bureau of Chongqing. The colliery's designed production capacity is 300,000 tonnes per year, which has been doubled to 600,000 tonnes.