Sources close to the former minister and others at the anti-graft agency confirmed the payment.
The sources told PT that the EFCC chairman, Ibrahim Magu, rejected the offer and asked for more return by the embattled former senator.
Mr. Magu, sources said, demanded that the former minister sign an undertaking to pay back N600m within a stipulated time.
The former minister rejected the demands, saying he had no means of raising such amount.
“He refused to sign the pledge, saying the money was too much,” an EFCC source said.
The source said Obanikoro, nonetheless, continued to cooperate with his interrogators. "He had really carried himself very well since he got here, really cooperating with everyone.”
EFCC spokesperson, Wilson Uwujaren, confirmed that Obanikoro had indeed returned some money. He, however, said the EFCC was still verifying the payments and continuing its investigation.
Obanikoro was remanded in custody after turning himself in to the anti-graft agency on October 17. He is accused of accepting more than N2billion from the embattled former NSA, Sambo Dasuki.