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SAN DIEGO –Six people were taken to hospitals Friday after San Diego police were called to break up a brawl at Lincoln High School.

A San Diego Unified police officer was transported to Mercy Hospital with traumatic head injuries, said Battalion Chief Mike McBride of the San Diego Fire-Rescue Department. Five students were transported for evaluation “either for direct pepper spray or crowd-exposure type pepper sprays.” One student was tased.

“We’ve also had a couple of students who were released to their parents at the scene without major injuries,” McBride said.

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The school police officer was injured when he was sent to break up a mob-style fight at the school, McBride said. After he was attacked, he called for backup. School and city police units were sent to the campus and they brought the situation under control, McBride said.

The San Diego  Fire-Rescue Department sent about 20 firefighters, two engines and six ambulances to the school, McBride said. It as not immediately clear how many police officers were sent to stop the fight.