Five people were confirmed dead and nine others injured in a firework plant explosion in south China's Guangdong Province Sunday morning, Xinhua quoted the local government as saying. The explosion was reported at 8:30 a.m. in a privately-run workshop in Qingtan town of Yingde City, a spokesman with the city government said. He said four people were killed on the spot and another one died later in hospital. The cause of the accident is under investigation.