HOUSTON, May 1 (Reuters) - A vessel chartered by Chevron CVX.N carrying some 300,000 barrels of Venezuelan oil was set to start discharging its cargo at a Venezuelan port on Thursday, according to shipping data and a source, the last tanker to empty following state company PDVSA's order to return the crude amid payment uncertainty related to U.S. sanctions.
(Reporting by Arathy Somasekhar in Houston; Editing by Chris Reese)
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