Police say the suspect entered the bank, displayed a handgun, and demanded money from a teller.
After obtaining an undisclosed amount of cash, the suspect fled the area of the bank on foot.
He was last seen heading in the direction of Skippack Pike and Route 202.
The suspect is described as a white male in his 40s to 50s, approximately 6'1, slim build with a small potbelly; he was wearing a dark blue hooded coat, light-colored dress shirt, and a bandana or mask covering part of his face.
This suspect is considered armed and dangerous.
At approximately 9:10 a.m., police received a report of a suspicious male on Pulaski Drive.
Three nearby schools - Stony Creek Elementary School, St. Helena's School and East Norriton Middle School - were placed on lockdown as a precaution.
Police investigated and the two matters were unrelated. The lockdowns were then lifted.
Anyone with information about the robbery or the suspect is urged to call the FBI at 215-641-8910 or the Whitpain Township Police Department at 610-279-9033.
There may be a reward for information leading to this suspect's capture; tipsters can remain anonymous.