All nine miners working undergroundwere killed in a gas explosion at a small coal mine in northeast China's Heilongjiang Province on Thursday morning.
The accident occurred at 5:40 am at the Xinjian No. 3 Shaft which belongs to the Qitaihe Mining Group in Qitaihe City, Heilongjiang.
The local mining safety supervision bureau and company leaders rushed to the site immediately. The nine miners are confirmed to have died at the scene.
Authorities will investigate the cause of the accident and punish those found responsible.
Zhang Liancheng, a deputy general manager of the company, attributed the explosion to an electricity and ventilation failure.
The small mine, with an annual capacity of 50,000-60,000 tons, had been ordered to close by the provincial authorities but the company had continued mining illegally, Zhang said.