US Central Command says US Navy halted sanctioned vessel M/V Sevan in Arabian Sea, ordering it to return to Iran under escort.
The vessel is among 19 "shadow fleet" ships sanctioned for transporting billions of Iranian oil, gas, propane, butane to foreign markets.
President Trump canceled an envoy visit to Pakistan, saying Iran lacks leadership; Jared Kushner and Steve Witkoff's diplomatic trip was also scrapped.
US mine‑clearing in the Strait of Hormuz may take six months; Brent crude trades above $105 per barrel amid supply concerns.