Nigeria's anti-graft agency has given 15 ex-governors wanted for corruption until the end of Friday to turn themselves in or face arrest.Five of the former governors have already been quizzed by the Economic and Financial Crimes Commission (EFCC), an official has told the BBC.
EFCC chairman Nuhu Ribadu declined to name the ex-governors being probed.
The governors enjoyed immunity from prosecution until their terms of office expired last month.
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