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.

Dozens of heavily armed deputies swarmed Loma Linda University Children's Hospital on Wednesday night after a caller told officials he was planning on "shooting up" the San Bernardino County medical facility.

San Bernardino County deputies have allowed Loma Linda children's hospital staff to return to the facility after finding no active threat inside Wednesday night.