This is Iran's most explicit warning since telling ships it was closing the export route on Saturday, a move that threatens to choke a fifth of global oil flows and send crude prices sharply higher. CAIRO: An Iran ian Revolutionary Guards senior official said on Monday (Mar 2) that the Strait of Hormuz is closed and Iran will fire on any ship trying to pass, Iran ian media reported. This is Iran 's most explicit warning since telling ships it was closing the export route on Saturday, a move