The Economic and Financial Crimes Commission (EFCC) is currently interrogating a former Minister of Aviation, Femi Fani-Kayode.
Officials of the anti-graft agency confirmed this to Channels Television on Monday in Lagos.
The former minister was invited to answer questions relating to the forgery of a medical report which he allegedly procured to evade his trial before a Federal High Court in Lagos, the sources said.
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.
At the last sitting of the court on October 13, the judge had imposed a cost of N200,000 on him due to his failure to appear before the court for his re-arraignment following the transfer of the former trial judge, Justice Rilwan Aikawa.
He was ordered to pay the fine or stand the risk of having his bail revoked after he failed to appear before the court for his re-arraignment.
Instead of appearing for his re-arraignment, the former minister had sent a letter to the court, claiming that his doctors had placed him on bed rest.
But the EFCC said its preliminary investigations showed that the medical report tendered by the former minister was forged.