The US seized a large oil tanker called the Skipper, which had been under sanctions for its ties to Iran, on December 10.

While Trump’s directive this week targeted sanctioned tankers, the vessel the US seized Saturday is not under US sanctions, the official said. The seizure wasn’t contested by the tanker’s crew.

The vessel was a Panamanian-flagged tanker carrying Venezuelan oil, according to the official, and was ultimately destined for Asia.