It happened Saturday morning just before noon in Forty Fort at Citizens Bank.
A man armed with a gun entered the bank at Wyoming Avenue and Welles Street.
He demanded cash and left on foot.
Surveillance cameras captured images of the man who pulled the stick-up.
Police aren't saying how much money the robber got away with.
But they caution he is armed and dangerous.
If you have any information call Forty Fort Police or 9-1-1