Iran has fired missiles at several US vessels in the Strait of Hormuz, according to Iranian state media. The incident adds to a rapidly escalating confrontation in one of the world’s most important maritime chokepoints.

The report came soon after the United States said it had attacked and destroyed five Iranian oil tankers. At this stage, there is no confirmed information on damage or on how the latest exchange may affect traffic through the strait.

The Strait of Hormuz is a strategically vital route for global oil shipments, which is why any military escalation there quickly draws international attention. The latest exchange raises concerns about wider disruptions to shipping and energy markets.