The Economic and Financial Crimes Commission (EFCC) is investigating the Head of Service, Winifred Oyo-Ita.
According to ChannelsTV, the head of the federal civil service is being quizzed by the anti-graft agency for alleged N3 billion contract scam.
ChannelsTV reported sources as saying that she was also being investigated for alleged abuse of duty tour allowance, money laundering and alleged theft of government funds.
Oyo-Ita is said to have been granted an administrative bail but is now hospitalized under the close watch of the anti-graft agency.
She was appointed as the head of the civil service of the federation in an acting capacity in October 2015 and confirmed in January 2016 by President Muhammadu Buhari.