EFCC Chairman Ibrahim Lamorde has been sacked and replaced with Ibrahim Magu, a top level official of the Economic and Governance Unit of the EFCC.
Ibrahim Magu has been elevated to the position of chairman of the commission.
Magu is remembered as a no-nonsense investigator of the commission at its inception. He was removed along with several other key officials by Farida Waziri when she became chairman in 2008.
Mr Lamorde was removed on Monday by President Muhammadu Buhari.
He was seen at the Presidential Villa, where he allegedly held a last meeting with the President.
No reason has been given for his sack.
There are also indications that he may have been replaced, but his successor has not been named.
Mr Lamorde took over as the chairman of the anti-graft agency on 23 November, 2011 after chairman Farida Waziri was dismissed by the former President, Goodluck Jonathan.