An explosion at a northern Chinese factory dormitory blamed on illegal explosives killed seven workers and injured one, the state news agency reported Wednesday. The blast ripped through the four-storey building located on the grounds of a factory producing slab stone in the village of Niugang near the northern city of Baoding just before midnight Tuesday, the official Xinhua News Agency said. The bodies of six workers were found buried in the collapsed building, while another died after being sent to the hospital.
