Six construction workers were killed and three others injured after the scaffolding on a building collapsed in north China's Shanxi Province, local authorities said Thursday.

The incident occurred in the Mianshan Mountain area, a scenic spot near Jiexiu City at around 8:30 a.m. Thursday, when the scaffolding collapsed on a bus station under construction, killing six workers at the site, Jiexiu city government said in a statement.

Three other workers injured have been admitted to hospital, it said.

An investigation into the cause of the accident is underway.