Authorities Wednesday circulated security photos of the so-called Bladed Bandit, who is wanted for brandishing a knife or gun while robbing three banks and trying to rob another in Los Angeles and Orange counties this month.
The man is described as white, about 5 feet 6 to 5 feet 9 inches tall, with a slender build and light-color hair and eyes.
"During the robberies, the suspect brandishes either a gun or knife and aggressively demands cash," said Laura Eimiller of the FBI. "He threatens to hurt victims if they don't comply with demands."
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The man may have an accomplice, described only as a white man in his 20s.
The suspect robbed a Chase branch on Jan. 2 in Seal Beach; a Wells Fargo branch on Jan. 16 in Cerritos; and a U.S. Bank location in Fountain Valley on Jan. 18. He also tried to rob a Farmers & Merchants bank on Jan. 16 in Long Beach.
Anyone with information on the case was urged to call the FBI at (310) 477-6565; or 911.