Iran's military ordered the full closure of the Strait of Hormuz to all oil tankers and commercial ships early Thursday, stating that vessels attempting passage would be fired upon. The announcement follows US-Israel strikes on Tehran that began February 28, with the strait serving as the sole maritime outlet for Gulf oil producers and normally carrying 20 percent of global oil and LNG shipments in peacetime. Prior to the order, Iran had imposed tolls up to $2 million per vessel and permitted selective traffic.