The anti-graft agency is also probing some officials of the Petroleum Equalisation Fund (PEF) for their alleged connivance with the marketers to make fraudulent claims for the payment of bridging funds.
The Executive Secretary of PEF, Mrs. Asabe Asmau Ahmed, could not be reached for comment while the spokesman of the agency, Mr. Goddy Nnadi, declined to comment, saying the matter was under investigation.