Former Minister of Petroleum Resources Diezani Alison-Madueke unilaterally extended crude oil for refined products (oil swap) contracts, a former Nigeria National Petroleum Corporation (NNPC) Group Managing Director (GMD) Austin Oniwon alleged yesterday. Oniwon alleged that “the minister at the time extended the contract between the Petroleum Product Marketing Company (PPMC) and its trading partners Duke Oil Company Incorporated and Trafigura ...