Four people were killed in a coal mine roof incident on Saturday morning in Wanyuan, Sichuan province, Xinhua News Agency reported.

The disaster occurred at around 11:00 am at the Changshi'er Coal Mine, leaving four people missing.

As of 11:30 pm on Wednesday, all the missing people were found and confirmed dead, the report said.

People responsible for the incident have been placed under control. Further investigation is underway.