US Central Command (CENTCOM) reported that its forces have redirected 94 commercial vessels and boarded two ships in the Arabian Sea while enforcing a blockade against Iran. In response, Iranian Supreme National Security Council Secretary Mohsen Rezaei stated on social media that Tehran has "recalibrated" its military posture and is considering establishing a maritime exclusion zone in the Persian Gulf to counter economic sanctions.

British Prime Minister Andy Burnham and U.S. President Donald Trump held a phone call on Monday, with Downing Street stating they agreed to continue working toward a Ukrainian ceasefire. This diplomatic exchange occurred one day after U.S. envoys Steve Witkoff and Jared Kushner met with both President Volodymyr Zelensky in Kyiv and President Vladimir Putin in Moscow, expressing hope for renewed trilateral negotiations.

Iranian state media announced the deployment of the solid-fueled Qassem Basir missile, which officials described as marking a strategic shift toward preemptive action against perceived threats, though it remains unverified whether this specific system was involved in recent incidents.

This announcement follows a U.S. statement that it intercepted Iranian ballistic missiles launched at its warships and retaliated by striking three Iranian oil tankers, an exchange experts identified as a significant escalation in the ongoing conflict.

The United States has reportedly shifted from diplomatic negotiations with Iran to a strategy of intensified economic sanctions and military action, including a reported maritime blockade, following President Trump’s rejection of a previous ceasefire agreement.

In response, Iranian officials have warned of potential military escalation and expanded hostilities, while the country’s Supreme Leader, Mojtaba Khamenei, has remained publicly absent since the reported death of his predecessor in February.