Ten employees of a coal company died in northwestern China on Saturday when a mountainside slope collapsed on them, state media reported.

Rescuers spent all day retrieving the workers who were buried in their vehicles en route to a mine site in Jingtai county in Gansu province, CCTV reported.

Ten died and seven were found alive with light injuries. Operations stopped around 8 p.m. Saturday.

The workers were employed by Shanxi Coking Coal Minbao group.

An investigation into the incident was underway.