PORTLAND, Ore. -- The FBI says a man dubbed the "Benjamins Bandit" is suspected of robbing his fifth bank in north or northeast Portland since mid April.

the latest robbery was yesterday morning at the United Advantage Credit Union in North Portland.

He got his nickname because he demands cash, but only in $100 bills, which bear Benjamin Franklin's portrait.

The FBI says he has not produced a gun nor threatened to have one.

Witnesses describe him as a black man in his 30s who wears a baseball cap, a black leather jacket and diamond 2stud earrings.