The US withdrawal from the Iran nuclear deal in May, and its planned reimposition of sanctions on Iranian oil sales, have heightened tensions in the Middle East.

Iran has warned that Washington is severely mistaken if it thinks Iran would be prevented from exporting oil.

In a war of tweets between US President Donald Trump and the Iranian leadership, threats have been flying in both directions, with a general in the Iranian Revolutionary Guard explicitly mentioning Tehran’s ability to close the Strait of Hormuz, through which most Middle Eastern oil and gas transits.