(Adds details about ship and the court case)
NEW YORK, Sept 9 (Reuters) - The U.S. Marshals Service hasblocked a Royal Dutch Shell-chartered vessel carrying up to600,000 barrels of crude oil headed to the Monroe Energyrefinery outside of Philadelphia from leaving the port inconnection with a civil court order, the federal agency said.
The vessel, a Malta-flagged Aframax named Advantage Avenue,will be allowed to discharge its cargo, but not allowed to leavethe port until a civil dispute originating in federal courtinvolving a payment disagreement is resolved, according to the federal agency.
The order was brought by PSARA Energy in federal court inPennsylvania, according to a PSARA local attorney.
The ship is carrying crude oil that was loaded inWilhemshaven, Germany, according to a source familiar with theplant's operations along with Reuters Eikon shipping data.
The case involves "multiple defendants," according to thelocal attorney, who referred all other questions to the company.
PSARA Energy and Shell could not be immediatelyreached for comment.
(Reporting By Jarrett Renshaw; Editing by Chris Reese, BernardOrr)