Mohammed Umar, director of operations at the Economic and Financial Crimes Commission (EFCC), has been appointed as the acting chairman as Ibrahim Magu, remains suspended.
Magu was arrested on Monday and whisked to the presidential villa in Abuja where he was grilled by a panel set up by President Muhammadu Buhari to probe the EFCC.
The panel is led by Ayo Salami, retired president of the appeal court.
It was alleged that he had four houses and was moving money outside the country through third parties.
The DSS in a 2016 report revealed that he was living in a N40m mansion paid for by a corrupt individual.
The Presidency is yet to issue an official confirmation on who replaces Magu either in acting or substantive capacity.
