SAN FRANCISCO -- The FBI is offering a reward in the case of a suspect they are calling the "Droopy Face Bandit" after a string of up to ten bank robberies in San Francisco since 2007, CBS San Francisco reported.

According to the FBI's wanted poster, the suspect is described as being five feet, three inches to five feet, seven inches tall with a very small build, and droopy cheeks.

The suspect is said to have flashed a gun during some of the robberies, and has targeted banks in San Francisco neighborhoods that are predominantly Asian, demanding money from tellers with a note, the station reported.

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The most recent robbery occurred on September 16, 2015 on Clement Street at the East West Bank.

There is a $5,000 reward being offered for information leading to the suspect's capture, according to CBS San Francisco.