Shipping data shows Iranian-linked vessels pass through the Strait of Hormuz before a U.S. naval blockade of Iranian ports takes effect. Multiple outlets cite ship-tracking information indicating that, on Tuesday, the number of vessels transiting the strait increases and most are linked to Iranian trade routes. The Jerusalem Post reports that nine of 11 vessels that pass through the strait on Tuesday sail via the Iranian route, according to Kpler ship-tracking data. Al-Monitor, citing Reuters, similarly reports that the number of vessels transiting the strait “ticks up” on Tuesday, with most vessels connected to Iranian trade, before the blockade begins on Wednesday.

The U.S. action described across reports is linked to President Donald Trump. Business Line and Al-Monitor state that Trump reimposes a naval blockade covering all Iranian ports, effective Wednesday. Al-Monitor also says the U.S. threatens further steps, including potential strikes on power plants and bridges, if Iran does not resume negotiations. The reporting frames Tuesday’s movements as occurring just ahead of the blockade start date.