ALHAMBRA — Students were evacuated from Alhambra High School Friday after someone phoned in a bomb threat to the campus, though a search of the campus revealed no danger, police said.

The incident began about 11:40 a.m. at the school, 101 S. 2nd Street, when “an unidentified person called this school and basically threatened that there was a bomb on campus,” Alhambra police Sgt. Jerry Johnson said.

“Initially there was a lockdown,” the sergeant said. “Shortly after the campus was evacuated.”

Police conducted a “thorough search” of the campus, he said. Once officials were confident there was nothing dangerous at the school, students were allowed to return to the campus about 2:30 p.m.

Parents were able to pick up their children at the normal time and place, Johnson added.

No information regarding the motive or suspect in the bomb threat was available.

The investigation was ongoing.