GUIYANG -- At least one vehicle has been swallowed up by a landslide in Southwest China's Guizhou province, local authorities confirmed Sunday.

The incident occurred at 3:39 pm in Erlang village, Xishui county, Zunyi, with debris covering vehicles on a nearby expressway.

More than 30 soldiers and three fire-fighting teams have already discovered a van beneath the rubble. The driver is seriously injured and efforts to extract him from the vehicle are still ongoing.

A rescuer told Xinhua that more people may be trapped. He estimated that there had been at least four vehicles on the expressway.