Seven people were killed and five others were injured when scaffolding collapsed at a construction site in central China's Hubei Province, local authorities said late Thursday. The accident happened at around 7 p.m. Wednesday on the fifth story of a building under construction in Nanzhang County, in the city of Xiangyang, Xinhua quoted the government as saying. Twelve of the 13 workers were buried under concrete and debris. As of 12 p.m. Thursday, seven people were confirmed dead and five injured. An investigation is underway.