Exchange of airstrikes between Washington and Tehran in the Strait of Hormuz

The United States and Iran exchanged barbs overnight Saturday to Sunday after a cargo ship sailed through the Strait of Hormuz on a route deemed unauthorized by Tehran. Iran reiterated its closure of the strait, threatening a "severe response" to any retaliatory action.

Tensions escalated in the Strait of Hormuz on Sunday morning. Iran's Revolutionary Guard announced it had struck a container ship that it claimed was sailing on an unauthorized route, before declaring the strait closed. Washington responded with strikes intended, in American words, to "degrade Iran's ability to attack civilian mariners."

This exchange of blows is the latest episode in a series of incidents that are jeopardizing the prospects for negotiations on the status of this strategic waterway. The Islamic Revolutionary Guard Corps had warned that any retaliation would be met with a "severe response," a formulation that did not deter US forces from intervening.

The Strait of Hormuz is one of the world's busiest shipping lanes, through which a significant portion of global oil exports pass. Its closure, even temporary, poses a direct threat to energy markets and international freedom of navigation. Neither capital has yet specified the extent of the damage on either side.