The exact amount looted was yet to be ascertained but it was estimated to be around Rs 15 lakh, sub-divisional police pfficer (Chakradharpur), Aman Kumar, said.
The four motorcycle-borne men arrived at the Chakradharpur branch of Allahabad Bank and looted the cash, he said.
A police team rushed to the spot and launched a search operation to track the culprits.