Authorities are working to identify a man who walked into the Fifth Third Bank, 702 North Green Bay Road in Waukegan, and demanded money late Wednesday afternoon. | Provided Photo

The FBI is investigating after officers responding to a panic alarm discovered a bank had been robbed by a man who implied he had a gun in Waukegan.

The Waukegan Police Department responded around 4:45 p.m. Wednesday to Fifth Third Bank, 702 North Green Bay Road in Waukegan.

A police report said officers received a report of a hold-up alarm that had been activated.

Employees told responding officers that the bank had been robbed by a man who stole cash, the report said.

The FBI Chicago Field Office said the suspect was described as a white male, medium build, wearing a black long-sleeved shirt, dark pants and a white hat.

The suspect displayed a note demanding money and the teller complied.

The FBI also said the suspect implied that he had a handgun. The suspect fled on foot and remains at large.

No injuries were reported in the incident. The FBI released a surveillance photo of the wanted suspect on Thursday.

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A regional alert was sent out to area law enforcement agencies to be on the lookout for the man.

The public can report tips anonymously by calling 312-421-6700 or visiting tips.fbi.gov.