Iran has blacklisted 45 tankers for allegedly violating its rules for crossing the Strait of Hormuz and warned that vessels conducting ship-to-ship transfers with them could also face action, escalating tensions over the key waterway nearly six months into the war.

Tanker traffic through the Strait of Hormuz remains severely depressed as Washington threatens an unprecedented economic offensive against Iran and Tehran threatens Gulf oil…

Iran warned on Sunday that some ships failing to comply with its transit regulations in the Strait of Hormuz could face penalties during subsequent passages, including fines,…