(WSB Radio) -- The search is on for a serial bank robber who has hit seven north-Metro banks in three weeks.

Dunwoody Police Sgt. Mike Carlson tells Channel 2 Action News the latest robbery happened Friday at a Wachovia on Riverwood Parkway in Cobb County.    He hit the Wachovia on Ashford-Dunwoody Road twice.

"He's very bold right now to hit seven banks in that amount of time," said Carlson.

The suspect, who usually wears a hat, polo, and khaki gloves, always uses a note.

 "We don't want this to escalate.  He has not been violent yet; however, he's very consistent .  He usually hits the banks toward the end of the week, the latter part of the week.  We want to catch this individual before he takes any extremely drastic measures," said Carlson.

The suspect, who has also hit banks in Alpharetta, Sandy Springs, and Roswell, drives a burgundy Tahoe.

Anyone with information is asked to contact Dunwoody Police.  Wachovia is offering up to a $5,000 reward.