Hedge fund Elliott Investment Management is weighing a bid for shares in the parent of oil refiner Citgo Petroleum under a U.S. court-ordered auction, while a group of creditors represented by Centerview Partners aims to lure ConocoPhillips to join another offer, five people close to the matter said. Investment banker Centerview has been retained to craft a potential bid on behalf of investors and creditors pursuing Venezuela's foreign assets in federal court in Delaware to recoup claims for expropriations and debt defaults, three of the people said. The Centerview group wants oil producer ConocoPhillips, which holds the largest claims in the court case, to join its effort ahead of the final bidding round, which closes in June.