ZHENGZHOU, July 8 (Xinhua) -- An explosion at a central China coal mine has left at least four people dead, four buried under debris and 34 injured.
Rescuers are still trying to ascertain whether any workers have been trapped below ground by the explosion.
The blast was reported at about 5:30 a.m. Thursday at Fenghuangling Coal Mine of Zhanhe District in the resource-rich city of Pingdingshan, Henan Province, a city government official said.
Half of a 2-storey building on the surface collapsed, leaving four people buried.
Thirty four injured people, including three severely hurt, are being treated in a local hospital.
Witnesses said window more than 100 meters away shattered in the blast.
The three severely injured were hit by debris from the damaged building, the spokesman said.
Work safety authorities said rescue work was continuing.