Nigeria, Sept. 11 -- The former Group Chief Executive Officer of the Nigerian National Petroleum Company (NNPC) Limited, Mele Kyari, is under interrogation at the headquarters of the Economic and Financial Crimes Commission (EFCC) in Abuja.

An EFCC insider, who is familiar with the case but craved annonimity to discuss the sensitive case, confirmed the development, earlier reported by Daily Trust, to our reporter Wednesday evening.

The source said via a phone call that Mr Kyari, who had earlier been placed on a watchlist, arrived at the commission's office for questioning around 2:30 p.m. on Wednesday. EFCC spokesperson Dele Oyewale did not respond to our reporter's calls seeking his comments on Wednesday evening.

While the exact issue...