An Iranian vessel removed an unexploded mine that had been attached to a Japanese-owned oil tanker which suffered serious damage after an explosion in the Gulf of Oman early Thursday, U.S. officials told Fox News, as the U.S. Navy released video purportedly showing the incident.

The imagery came from the USS Bainbridge, a guided-missile destroyer which rescued 21 sailors from the stricken tanker.

At least one other mine attached to tanker’s hull detonated, causing the blast. It happened near the strategic Strait of Hormuz, a key route for oil shipments in the region.