Philadelphia police investigated in videotaped beatings

(CNN) - An internal investigation is under way into the videotaped beatings of three men by several Philadelphia police officers after a traffic stop, according to Police Commissioner Charles Ramsey.

The video, shot by WTXF-TV in Philadelphia, shows at least a dozen police officers pulling the men - who were suspected to have been involved in a shooting - out of a car after a vehicle pursuit Monday night. At least eight officers are seen either kicking, punching or striking two of the suspects with batons while the men lay restrained on the ground.

"Unfortunately what you're looking at now is what's under investigation," Ramsey said of the videotape. "The level of force is only that necessary in order to effect an arrest. So obviously, I'm disappointed at what I'm looking at. But that's why we have investigations."