About 10 FBI agents and dozens of other law enforcement officers spent the day looking for Stephen Ivens, 35, who was last seen Friday at the Burbank home were he lives with his wife and 1-year-old son, the Los Angeles Times reported.
Ivens, who works out of the FBI's Los Angeles bureau specializing in national security, may have headed for the Verdugo Mountains, officials told the newspaper.
Authorities declined to discuss why they believed Ivens may be suicidal.
He has been with the FBI for more than three years and previously spent eight years with the Los Angeles Police Department. He is described in a police report as white, 6-feet tall, 160 pounds, receding brown hair and wearing prescription glasses.