The vessel, known as Bella 1, keeps moving while cutters and surveillance aircraft take turns shadowing it, Military.com website said in a report Saturday.

EIAMedia, the U.S. Energy Information Administration, sent Military.com updated export figures showing where Venezuela’s oil is now headed.

The data essentially shows less oil for the U.S. and more for China, the latter of whose purchases nearly doubled while U.S.-bound barrels dropped sharply. Malaysia also saw a jump, which analysts said signals ownership chains and ship-to-ship transfers that make cargo harder to trace.

Analysts warn that even if the Bella 1 is stopped, others can reroute and keep revenue flowing to Maduro’s government.

DID