"There were some Village High kids that came onto the Amador campus after school," Tryphonas said, adding one Amador Valley High student was hit with an object and received minor injuries.
Tryphonas would not say what the object was because the investigation is continuing.
The teens scattered when police arrived, but one was caught and charged. His name is being withheld because of his age.
Tryphonas downplayed the idea that the fight was gang related, describing the fight as a personality conflict.
"These are people who don't like each other, he said.