An estimated amount of Rs 29.57 crore worth irregularities at the Rourkela branch of the OSCB was detected between 2005 and 2015.
"We have asked the EOW of the Crime Branch to probe into the irregularities detected during a special audit, Cooperation minister S N Patro told reporters.
The minister said the department has also ordered the OSCB registrar to initiate proceeding against all the accused persons and initiate legal action against erring bankers.
The minister said the special audit report has also recommended recovery of money from three former branch managers Siba Kumar Das, Sanjeeb Mishra and Raghunath Sahoo respectively. These three managers had disbursed loans without keeping required surety.
Meanwhile, Raghunath Sahu, one of the accused manager said: "I have not committed any irregularities. We have to verify the basis of the special audit."
Earlier, the cooperation department had also handed over a similar fraud case in Malkangiri district to the EOW of Crime Branch.