A video clip on Anhui TV showed stones and glass fragments scattered in the road, with blood on the ground.

"Lots of people surrounded the policemen. The police escaped, and the people chased and beat them," an elderly witness told local television.

Many police had head and eye injuries, the TV report said.

Phone calls by China Daily to Hefei public security bureau went unanswered on Monday.

A report by China Central Television showed a woman wearing a purple shirt stomping on a police officer's head after pulling him to the ground.

Police recently raided three pyramid-selling dens in Binhu, a new district of Hefei, CCTV reported.

It is not the first time police in Hefei have been attacked by pyramid-selling groups.

On June 16, suspects attacked officers and stole their guns at a residential community. Police detained more than 80 suspects, CCTV reported.

About the broadcaster:

Lance Crayon is a videographer and editor with China Daily. Since living in Beijing he has worked for China Radio International (CRI) and Global Times. Before moving to China he worked in the film industry in Los Angeles as a talent agent and producer. He has a B.A. in English from the University of Texas at Arlington.

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