Image result for 21 people die in Northwest China roof collapseTwenty-one miners trapped underground were killed after a roof collapse occurred at a coal mine in northwest China’s Shaanxi Province.

Local authorities say the accident took place on Saturday at the Lijiagou coal mine of the Baiji Mining Co, Ltd, a privately-owned company, in the city of Shenmu.

87 people were working underground. Sixty-six of them were brought to safety after the accident.
Another two are still trapped.

An investigation into the cause of the accident is underway.