Authorities say they received a call around 10:30 a.m. that there was a bomb on campus in the 7400 block of Mango Avenue. The school was placed on lockdown, then investigators evacuated everyone from the school at about 12:10 p.m.
A bomb squad team searched the campus, but no threat was found. The lockdown was lifted by 1:18 p.m.
Parents ran to find their children once the all clear was given. Their relief was evident as they comforted their frightened sons and daughters.
"I got a little bit scared, we didn't know what was going on, not a lot of information, and first time experiencing this," said parent Yuri Furlong.
This is the fourth threat made against a school in the span of a week. On Monday, two schools in Monrovia were locked down, followed by a Duarte school on Tuesday. On Thursday, it was Arcadia High School.
The FBI is investigating and believe the hoax calls at those schools were made by the same person. Local police are looking into whether the Fontana incident is also related, but the FBI is not involved in the Fontana threat.