A loaded oil tanker docked in a port in western Cuba despite the ongoing blockade from the United States, according to a new report.

Spanish news agency EFE detailed that the Nicos I.V. entered the bay of Matanzas on Monday. The vessel’s identification code is IMO 9103843, its flag being from St. Vincent and the Grenadines. It appears to be partially loaded.

The outlet could not confirm whether the ship came from a port outside Cuba, but should that be the case it would be the first such vessel docking there since the Ocean Mariner arrived from Mexico with about 85,000 barrels of oil.

Ship-tracking platforms did not spot the Nicos I.V. in a Cuban port over the past week, but EFE noted it could be operating in the country’s waters without disclosing its location.