Odyssey Marine Exploration of Tampa says documents released by Wikileaks show the U.S. State Department had offered to help Spain's side in the matter in exchange for help in returning a multimillion-dollar painting seized by World War II-era Nazis to a U.S. citizen.
Odyssey said Wednesday it filed a motion urging an appeals court to throw out a "friend of the court" brief by the U.S. government supporting Spain's bid for 17 tons of coins raised from a sunken Spanish galleon off Portugal in 2007.
A federal court ruled for Spain in 2009. Odyssey is appealing.
The State Department had no immediate comment when contacted Wednesday by The Associated Press.