The U.S. military said Tuesday it seized an Iran-linked tanker in international waters, in what appeared to be a fresh move to enforce its blockade as the cease-fire nears expiration.

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.