The fire originated at the bank at 9:28pm.
Twelve firefighting units are working to douse the fire till filling the report at 10:40pm Thursday night.
Mahmud Hasan, the duty officer at the Fire Service control room, confirmed the matter to themorningbellbd.com.
When contacted BB deputy governor SK Sur, said he is yet to know the fact behind the fire.
“I am rushing to the spot. Later I can say after assessing the damage,” he said in reply to a query.
There are important documents in the floor 13th and 14th.
SI Khoda Newaz of Motijheel police station also confirmed about the fire.
Unknown cyber criminals tried to steal nearly $1 billion from the Bangladesh Bank in February, one of the biggest bank frauds ever.
The hackers managed to transfer $81 million via an account at the New York Federal Reserve to four accounts in fake names at a branch of Rizal Commercial Banking Corp in the Philippines.
Most of the money was laundered through Philippine casinos and only about $15 million was recovered from a gaming junket operator and returned to Bangladesh.
A Philippine anti-money laundering agency last month filed charges against five RCBC officials in connection with the theft.