Iran flaunted its tightened grip over the Strait of Hormuz on Thursday with video of its commandos storming a huge cargo ship, after the collapse of peace talks.

Iranian authorities said they consider the U.S. blockade of the country’s ports as an act of war and a violation of any ceasefire agreement.

The attacks, which Iranian media said were carried out by Iran's paramilitary Revolutionary Guard, came after Trump said the U.S. would indefinitely extend the ceasefire.