HELLERTOWN, Pa. -

Investigators have released surveillance pictures of the man who they say held up a bank in Northampton County Thursday.

Police say these pictures show the man who robbed the Bank of America branch on Main Street in Hellertown.

They say he got away in a silver GMC Sierra truck.

Police say they believe the same man is behind three bank robberies in Upper Macungie Township.

If you know who he is, call Hellertown Police at 610-838-7040.