Del Mar High School in San Jose was placed on lockdown Thursday afternoon while police investigated a report of a student with a gun, officials say.

District officials say all students and staff are safe. The lockdown was lifted at 3:30 p.m.

Police say a 16-year-old girl was taken into custody after she allegedly showed a gun and made threats to a male student off campus on Wednesday.

Police initially reported a weapon was located, but later said that information was not accurate.

The campus is located off South Bascom Avenue, just south of Interstate 280. An investigation is ongoing.