Police say a thief has been scamming ATM customers at a Brooklyn bank by distracting them in order to gain access to their accounts and withdraw cash. 

The man uses a method called "shoulder surfing" to steal victims' money, police say.

Inside an ATM lobby, he waits for victims to enter, then for the victims to dip their cards into the ATM. The suspect then distracts the victims and guides them to use an adjacent ATM.

The victims, not realizing they've already activated the first ATM, proceed to enter their PIN into the adjacent ATM as the suspect watches, police say. The suspect then enters that PIN on the activated ATM to withdraw cash from the victims' accounts. 

The suspect is accused in three incidents at Banco Popular at on Eastern Parkway in Weeksville -- two on March 20 and one on March 24.

Anyone with information is asked to contact Crime Stoppers at (800) 577-TIPS or at nypdcrimestoppers.com.