Eleven construction workers were killed, and two others left seriously injured after an elevator collapsed at a construction site in north China's Hebei Province Thursday morning, local authorities said.

The collapse occurred around 8 a.m. in Taocheng District of Hengshui city, according to the city government. 

The injured are being treated at a local hospital. 

An investigation into the cause of the accident is underway. 

(Top image: CCTV photo)