ARCADIA (CBSLA.com) — Police Wednesday were searching for suspect who tried to rob a San Gabriel Valley bank.

The lone male suspect entered the Citibank located at 100 South First Avenue in Arcadia around 1:20 p.m. Monday, Arcadia police said.

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“The suspect showed the teller a small black case which he said contained a bomb.  The suspect demanded money and said the device would detonate if the teller did not comply,” Sgt. Tom Le Veque said.

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The teller told detectives that the suspect grew impatient, appeared nervous and fled the bank on foot before taking any cash.

The suspect is described as a male Caucasian, between 23 and 30 years old, about 5 feet 6 inches tall,  and 160 pounds. He has brown hair and was wearing a red long sleeve sweater and tan baggy shorts at the time of the attempted robbery.

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Anyone with information on this crime should call the Arcadia Police Department at (626) 574-5150.