Femi Fani-Kayode, a former Minister of Aviation, is currently in the custody of the Economic and Financial Crimes Commission (EFCC).
Fani-Kayode had recently decamped to the ruling All Progressives Congress (APC) in an attempt to stop his trial over an alleged N4.6 billion fraud.
An officials of the anti-graft agency had confirmed that the former minister is in its custody on Monday afternoon in Lagos.
Fani-Kayode was said to have arrived at the Lagos Office of the commission in the company of his lawyer at about 1pm.
He is still answering questions from the EFCC investigators as at the time of this report.
The commission said it would give an update on the interrogation later when it concludes its investigations.
Fani-Kayode is standing trial on an alleged N4.6 billion fraud before Justice Daniel Osiagor of the Federal High Court sitting in Lagos.
The EFCC had charged him alongside a former Minister of Finance, Nenadi Usman, and two others on 17 counts of conspiracy, money laundering, and fraud.