Palos Verdes High School was placed on lockdown for nearly two hours after an anonymous threat was received by phone on Thursday, May 16, authorities said.
Palos Verdes Estates police officers went to the campus, at 600 Cloyden Road, just past 11 a.m. to investigate, and they placed the campus on lockdown as a precaution.
But just before 12:45 p.m., police said the lockdown was lifted and all students and staffers were safe.
Afternoon classes were canceled for the day.
PV Transit provided a bus for students who normally take the bus after school, while taxis for students with special needs had been contacted, police said.
The lockdown prompted the rescheduling of an AP Statistics test.
Police remained on scene as a precaution.
School officials said the school received a phone threat and residents were asked to avoid the area while police searched the campus.
It was not known whether the threat was related to a recent “promposal” incident involving the high school.
A photo surfaced this week of a boy and a girl with a poster board that had a written prom proposal on it that included, in letters highlighted in the message, a slur directed toward African Americans. The boy and girl are white.
The principal condemned the so-called promposal, or prom proposal, and spoke with students about it. Palos Verdes High School’s prom is on Saturday.