A group of petitioners attacked local government buildings early Monday morning in northwest China's Gansu Province.

Huang Huaming, an official with the Longnan city government, said that the petitioners attacked the compound of local government buildings, and smashed windows and cars.

The petitioners left the site early Tuesday morning.

Initial investigation showed that the incident was related to house demolition.

(Xinhua News Agency Novebmer 18, 2008)