KUNMING - Two workers were confirmed dead and another was injured after the roof of a colliery collapsed Sunday in southwest Yunnan province, the local government said Monday.

The accident happened at 1:07 pm Sunday in a pit of the Yangjiagou Coal Mine in the coal-rich Fuyuan county, the county government said in a press release.

Of the four workers who were doing repair work in the pit, only one escaped, it said.

The three trapped workers were found and pulled out of the pit Monday, but the two died while hospitalized.

The third worker is being treated at the county hospital, the document said.

The government did not identify the victims.

The local work safety bureau has launched an investigation.