US forces struck Iranian rocket launchers near the Strait of Hormuz on Sunday, marking the first military action in about a month, according to a US official who spoke on condition of anonymity. The official said Revolutionary Guard forces were observed preparing to launch rockets with sea mines into the strait. The US military last week completed clearing sea mines from the strait's international shipping routes.

Semiofficial Iranian news outlets reported sounds of explosions near Larak island in the strait. Iran's Revolutionary Guard, in a statement carried by state broadcaster IRIB, said the attack killed and wounded several of its fighters and civilians, and vowed to respond and punish those responsible.

The strike came days after the Trump administration said it would focus on increasing economic pressure, rather than military action, to try to end its war with Iran.