Venezuelan state oil firm PDVSA has been barred from a Caribbean storage terminal due to unpaid bills.
NuStar Energy claims it is owed $26m, according to Reuters.
The suspension came into effect when a payment was missed for use of the Statia facility on St Eustatius.
The news is the latest indication of the company's trouble with meeting obligations.
In January, Reuters reported that more than 4m barrels of crude and fuel were stuck on tankers off the Venezuelan coast after PDVSA was unable to meet hull-cleaning, inspection and port fees in the country's economic crisis.
