An armed bank robber was shot and killed by police in Montgomery County on Wednesday, according to officials.

The Montgomery County Police Department said the bank robbery happened at the BB&T Bank in the 1100 block of Wayne Avenue in Silver Spring near the Silver Spring Metro station.

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Authorities said the suspect, only described as a male, walked into the bank and told a manager he had a bomb in his backpack and showed the employee a handgun. When the suspect demanded $20,000, the manager walked over to the teller station and triggered the panic button, according to police.

Officials said the suspect fled the bank without any money and ran into a back alleyway near the Silver Spring Metro station where he was confronted by an officer.

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After a confrontation, authorities said the officer shot the suspect. The suspect was rushed to the hospital where he died, according to officials. Police said the officer was not injured during the confrontation.

A bomb squad was called to the scene to inspect the backpack and nearby buildings were evacuated as a precaution.