It happened last week at the FNCB branch in Jenkins Township, near Pittston.
Investigators said the robbers tied up three bank employees during the heist.
Authorities said the robbers were wearing masks, possibly to conceal skin color or tattoos.
They believe the robbers hid the minivan they used as an escape vehicle and then moved it closer to the bank the next day. It was recovered by police on Saturday.
A $2,500 reward is being offered for information that leads to the capture of the robbers.
FBI investigators ask anyone who saw the van in the general vicinity of the bank between Thursday and Saturday of last week, or anyone else who may have info on the robbers to please contact the FBI at 570-344-2404.