The National Accountability Bureau (NAB) Chairman Justice (retd) Javed Iqbal has been advised to refrain from unnecessary movement.
The National Accountability Bureau had been threatened with bomb attack on the headquarters.
The life of NAB chairman is at risk.
The NAB launched investigation into several corruption scams.
NAB Chairman said, they would continue to perform their duties and they were not afraid.
The relevant departments and officials have been informed about the security threats.