Five construction workers were killed after they fell from a scaffolding in Beijing Tuesday, local authorities announced Wednesday. The accident happened at about 3 p.m. at a construction site in Tongzhou district in eastern Beijing as the five workers fell from the six floor when the scaffolding leaned, sources with the district government told Xinhua. All the workers died after emergency treatment failed by 9 p.m. Tuesday night. The Beijing Administration of Work Safety has launched an investigation into the cause of the accident. Work at the construction site has been halted for rectification and the local authorities have launched safety checkups targeted all construction sides in the district.