UNION — A Waterville man was arrested Sunday afternoon after police said there was a physical altercation at a local campground.

Treshawn Benbow, 21, was arrested and charged with possession of a firearm by a prohibited person, possession of a firearm on school property, and violation of conditional release. The district attorney’s office later added an unlawful possession of drugs (Gabapentin).

According to the Knox County Sheriff’s Office, at approximately 1 p.m. on Sunday, Sept. 4, Officer Juan Alcala and Sgt. John Palmer responded to the report of a fistfight at Mic Mac Cove Campground in Union. When officers arrived, they were told the two suspects had left on foot. Officers were also informed a knife was involved.

Officer Alcala located two men at the Union Elementary School, next to the campground. School was not in session. Officer Alcala detained them until Sgt. Palmer arrived and then returned the two men to the campground.

One man was released after talking to a campground official. Benbow was on bail conditions as the result of an assault charge from June in Waterville. He also has a 2019 conviction from Kennebec County for aggravated assault. That felony makes it illegal for him to possess a gun.

Benbow had a backpack which contained a loaded 9 mm Rugar handgun.

No bail was initially set for Benbow and he remains held at the Knox County Jail in Rockland. Benbow made his initial appearance in the Knox County court Tuesday afternoon Sept. 6 and Judge John Martin set bail at $225 cash along with a Maine Pre-Trial Contract.