ROUND ROCK, Texas (AP) -

Police are investigating after a resource officer at a Central Texas high school used a stun gun on a student after being called to break up a fight.

Round Rock police Cmdr. Jim Stuart says the 16-year-old wasn't injured after being shocked Monday at Stony Point High School.
Stuart said the fight involved two students, but when the officer arrived there were up to 10 students around them.
Stuart said a student trying to break up the fight had grabbed one of the aggressors in a bear hug and the officer mistakenly thought the fight was between them. He said  the officer told the boy restraining the other to get on the ground but he balled up his fists, so the officer used the stun gun.