U.S. forces board an oil tanker previously sanctioned for smuggling Iranian crude oil

U.S. forces have boarded an oil tanker previously sanctioned for smuggling Iranian crude oil in Asia, the Department of Defense said Tuesday.

In a social media post, the Pentagon said U.S. forces “conducted a right-of-visit maritime interdiction” and boarded the M/T Tifani “without incident.”

It’s the latest move in the U.S. war on Iran to stop any ship tied to Tehran or those suspected of carrying supplies that could help its government, from weapons and oil to metals and electronics. The announcement comes hours ahead of the expiration of an already tenuous ceasefire between the U.S. and Iran, and as Pakistan attempts to broker talks between Washington and Tehran.

Ship-tracking data showed the Tifani was carrying oil in the Indian Ocean on Tuesday between Sri Lanka and Indonesia. The Pentagon described the Tifani as “stateless” despite it being a Botswana-flagged vessel. The announcement did not say precisely where or what time Tuesday the ship was boarded.

“As we have made clear, we will pursue global maritime enforcement efforts to disrupt illicit networks and interdict sanctioned vessels providing material support to Iran —anywhere they operate,” the Pentagon announcement said, echoing previous statements from Trump administration officials. “International waters are not a refuge for sanctioned vessels.”

Gen. Dan Caine, chairman of the Joint Chiefs of Staff, said last week that the U.S. blockade would extend beyond Iranian waters and the war theater under control of U.S. Central Command.

U.S. forces in other areas of responsibility, he told reporters at the Pentagon, “will actively pursue any Iranian-flagged vessel or any vessel attempting to provide material support to Iran.” He specifically pointed to operations in the Pacific and explained that the U.S. would target vessels that left before the blockade began outside the Strait of Hormuz, a crucial waterway for energy and other shipments.

The military also detailed an expansive list of goods that it considers contraband, declaring that it will board, search and seize them from merchant vessels “regardless of location.” A notice published Thursday says any “goods that are destined for an enemy and that may be susceptible to use in armed conflict” are “subject to capture at any place beyond neutral territory.”

This story was originally featured on Fortune.com