Police are looking for a suspect who has robbed at least 11 banks since April.    
Police say the man has been averaging a bank hit every few days. In each case, the robber passes a note and demands hundred and fifty dollar bills and for no dye packs.      

The first robbery occurred at a Sovereign Bank in mid-April. Detectives say he struck again a few weeks later, and 10 more robberies occurred in less than three weeks during that spree.      

Most of the hits have been on Broadway and Park Avenue in Manhattan. Two banks were robbed twice.      

Police say they know who the robber is but so far he has eluded police. Authorities say the suspect has an extensive record and has served time for drug dealing.    

The suspect has been identified as 21-year-old Cornell Neilly.

Anyone with information is asked to call Crime Stoppers at 1-800-577-TIPS (8477). Tips can also be submitted online.

Get the latest from NBC 4 New York anytime, anywhere. Follow us on Twitter, Facebook and Google+. Get our apps here and sign up for email newsletters here. Get breaking news delivered right to your phone -- just text NYBREAKING to 639710. For more info, text HELP. To end, text STOP. Message and data rates may apply.