OW Bunker & Trading’s US subsidiaries are locked in a struggle with ING Bank over who has rights to collect on unpaid bunker bills as they also seek a buyer to take over the collapsed marine-fuel giant’s US business.

Left to fend for themselves after the collapse of their Danish parent, the entities have filed a complaint against the Dutch bank, which was OW’s largest secured lender when the bunker supply giant imploded earlier this month, in the US Bankruptcy Court in Bridgeport, Connecticut.

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