LAS VEGAS (KLAS) — Three people were arrested after they went to Legacy High School to confront a student on Thursday. School district police said one of the suspects drove a stolen car to the school, and a loaded 9mm handgun was found under the front passenger seat.

“After a brief confrontation, the three suspects were taken into custody,” according to Lt. Bryan Zink of the Clark County School District Police Department. None of the suspects were students at Legacy, police said.

The incident happened around 11 a.m. on Thursday.

One 18-year-old adult was arrested and transported to the North Las Vegas Detention Center for trespassing and participating in a fight.

Two juveniles were arrested. Both face charges of possession of a firearm by a minor, possession of a dangerous weapon on school property, burglary, disturbance at a school and participating in a fight.

One of the juveniles faces additional charges — battery on a police officer and possession of a stolen vehicle, Zink said. “Once in custody one of the suspects became violent and battered a CCSDPD Officer,” according to Zink. The officer wasn’t injured.

Parents and students at the school were notified of the altercation through a letter sent by school administrators on Thursday.

It’s been a busy week for CCSD in regard to school violence incidents.

On Wednesday, three arrests were made in three separate incidents on CCSD school campuses involving students and teachers.

North Las Vegas Police assisted with the investigation.

The task force involving Metro police and ATF agents picked up the firearm for ballistic testing.