A case was lodged over the burglary at Sonali Bank branch on Saturday night.
Abdus Samad, deputy general manager of Sonali Bank in Bogra zone, filed the case with Adamdighi police station.
Four more people have been detained for interrogation into the incident on Sunday morning.
Police also quizzed the branch manager following the bank burglary, Officer-in-Charge of Adamdighi police station Md Nazrul Islam said.
On Saturday, five people including the cashier of the branch were detained for interrogation.
About Tk32.5 lakh was stolen from Sonali Bank’s Adamdighi branch in Bogra on Saturday.
Burglers dug a tunnel from a nearby furniture shop to reach the vault of the bank.
In similar fashion robbers took away Tk16.4 crore from the Sonali Bank main branch of Kishoreganj on January 24 by digging a tunnel from an adjacent house.