Police were responding to a student fight outside of a high school in Allentown, PA.  At some point after arriving on scene, the fight turned on the officers.

The video shows a scuffle between a student and two officers.  A female is seen attacking a police officer on the ground.

A few seconds later, the attacker breaks free and the officers give chase and engage in a physical confrontation again.

Four Allentown offers were injured in the fight.

More information here