The new head of Iran’s Supreme National Security Council on Sunday said Tehran plans to announce an “exclusion zone” outside the Strait of Hormuz aimed at vessels it believes are attempting to transit the waterway.Mohsen Rezaei’s comments to Iran’s state broadcaster came with few details, a day after the US struck three Iranian oil tankers in response to Tehran launching ballistic missiles at US warships. Experts called the launches a dangerous escalation after Iran’s previous attacks at sea targeted commercial shipping.The new zone should be announced in the coming days and weeks and “will begin from the line of the US naval blockade, extend toward the Strait of Hormuz, and from this side continue into the Persian Gulf,” Rezaei said. “Any ship that enters this area with the intention of passing through the Strait of Hormuz and is identified will be placed on our sanctions list.”It is not clear where Iran defines the location of the weekslong US blockade, which is aimed at Iranian ports and keeping Tehran from shipping out its oil. The US military has said over 20 warships are supporting the blockade, which as of Sunday had redirected 92 commercial ships and disabled three.The US has been introducing new measures to increase the economic pain on Iran after negotiations collapsed and no end to the intermittent fighting appears in sight. Meanwhile, Iran continues to attack some ships trying to transit the strait, which has become an important source of leverage for Tehran in the war that began February 28 with US and Israeli strikes.Iran earlier Sunday said it struck an unmanned US vessel trying to enter the Strait of Hormuz, a claim that the US military dismissed as a “total lie”.US Central Command said Saturday that one of the tankers it struck, the Kylo, had sunk in the Gulf of Oman. Photo: US Central Command via Reuters