LOS ANGELES (AP) — Authorities say a Southern California man has been charged with making a series of phony threats that disrupted schools, hospitals and even a mall in the San Gabriel Valley.

Twenty-six-year-old Gerardo Cortez of Monrovia was charged Thursday with making criminal threats and falsely reporting an emergency. Cortez, who reportedly has a previous arrest for making a bomb threat, remains jailed on $250,000 bail.

Prosecutors contend that beginning on Sept. 9, Cortez made telephone calls threatening to shoot people with an AK-47 or claiming to have seen a gunman at local schools, a hospital and the Westfield Santa Anita Mall.

Four medical centers, the mall and several schools were searched but nothing was found.