An early morning factory fire has killed 15 people and severely injured three others in Shenzhen, ap said quoting a state news agency Wednesday. Xinhua News Agency said the fire in Shenzhen, a booming industrial city in Guangdong province, broke out several hours before dawn. It said 15 people were confirmed dead at the scene. Firefighters rescued six from the building, but three others were taken to a hospital with serious injuries. The cause of the fire was being investigated, Xinhua said.