Detonators caused Friday's explosion at a office building of a mining company in north China's Shanxi Province, Xinhua quoted police as saying today. The illegally bought detonators were stored in the first floor office of a deputy boss of Dongfang Zhenxing Coal Mining Co. Ltd in Nanlou Town, Yuxian County, the Shanxi Public Security Department said. The blast occurred at 4:30 p.m. Friday in the three-floor office building of Dongfang Zhenxing. Four people, all mine staff, including the deputy boss, died. The explosion was still being investigated.
