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Iran plans to announce an exclusion zone near the Strait of Hormuz for vessels trying to transit the waterway.
The move was announced by Mohsen Rezaei, identified as Iran's national security chief or head of the Supreme National Security Council in the reporting.
The announcement follows a U.S. strike on three Iranian oil tankers.
Reporting says Iran had launched ballistic missiles at U.S. warships before the tankers were struck.
Why it mattersIt could affect global oil shipping and raise the risk of new maritime disruptions.
More context
The articles describe conflicting claims over control of the waterway and over recent military incidents.
Some reports say diplomatic efforts have stalled and regional mediators are being met with distrust.