U.S. Central Command posted a video of U.S. Marines boarding a cargo ship suspected of running the Strait of Hormuz blockade on Tuesday morning.

The U.S.’s economic strangulation of Iran continued when U.S. Marines from the 31st Expeditionary Unit fast roped onto the M/V Blue Star III in the Persian Gulf, after it was suspected of trying to travel to an Iranian port. The video posted by CENTCOM showed Marine helicopters taking off from a U.S. Navy ship in the dawn hours on Tuesday, landing a squad of Marines directly onto the cargo containers of the ship.