Students and staff were advised to shelter in place as authorities scoured the campus for the potential threat, which was deemed to be unfounded.

A false call for an armed shooter triggered a massive police response at Clarement McKenna College; L.A.'s second 'swatting' incident in two days

Investigators believe a Wednesday evening, March 12, call about an armed man in the children’s section of the Loma Linda University Medical Center that prompted evacuations and a response of 100-plus officers from across the region was a hoax, authorities said. There were no injuries, and no gunshots fired, they said.

A caller told deputies that they were going to "shoot up" the hospital and that they had a bomb, which was determined to be a hoax after an hours-long investigation on Wednesday.