LANZHOU -- At least one person was buried in the rubble of a collapsed building in northwest China's Gansu Province on Monday, local authorities said.

The building collapsed around 9:50 a.m. in Chengguan Township, Zhuoni County, according to sources with the fire-fighting authorities of the Tibet Autonomous Prefecture of Gannan, which administers the county.

It has been confirmed that an excavator driver was buried under the debris, but rescuers have not yet determined whether more people were buried.

Search and rescue work for the driver is under way.