According to police spokesman Lt. Jeff Nightengale, officers were sent to a home in the 11600 block of Gilbert Street in Garden Grove around 2 p.m.
A man, identified as Justin Costa, 23, reportedly had fled the home after allegedly threatening to harm his mother and stepfather. The suspect was spotted walking with a rifle bag containing two rifles.
Gilbert Elementary School, located at Gilbert Street and Orangewood Avenue, was locked-down as a precaution.
Costa turned himself in to police, being taken into custody at Ball Road in Anaheim. The weapons were not found, and Costa was booked into Orange County Jail on the charge of making criminal threats and for outstanding arrest warrants.