SANTA ROSA, Calif. (KRON) — A lockdown that was initiated Friday at Montgomery High School amid reports of a student with a handgun on campus has been lifted, police said. No handgun was located after several classrooms and larger congregating areas were searched. The Santa Rosa Police Department received a call from a student at 10:45 a.m. who reported seeing a fellow student on campus with a handgun.

The gun was being “shown off” to other students, the reporting student said. Police said it didn’t appear the suspect was threatening people with the handgun. SRPD dispatched several officers to campus and alerted the School Resource Officer on campus.

The SRO identified the area where the student with the gun was reported to have been. SRPD officers arrived at 10:48 a.m. Several students ran when they saw the officers arrive on campus, police said. The students who fled were isolated in three portable classrooms on the north side of campus.

During the lockdown, officers searched several classrooms and contacted the students believed to be involved in the incident. Students were removed from the three portable classrooms one at a time. No handgun was found. However, in one classroom, officers found a fixed blade knife with a black handle wrapped in a Montgomery High School shirt.

The lockdown was released at 1 p.m. The incident was isolated to Montgomery High campus, police said. During the course of the investigation, officers learned that Friday was “Senior Assassin Day,” at the school. This refers to a social media game that encourages seniors to bring water guns to school and “eliminate” specific people. These kinds of games have led to students “bringing perceived handguns on campus and targeting other students, teachers, and administrators,” police said.

Montgomery High School is the same high school where two students were stabbed, one of whom was killed, in an art class in March. This incident prompted many to question the school’s safety in general.

Bay City News contributed to this report.