Iran shuts down Strait of Hormuz for 'unprecedented' live fire drills

Iran has shut down the Strait of Hormuz for a military drill amid a US military build-up in the Arabian Sea, in a move that serves as a warning to the world if Donald Trump orders an attack.The temporary closure of parts of the strait came as Iranian news agencies reported live fire exercises in the vital waterway, through which 20 per cent of the world's oil passes.The move is a rare, perhaps unprecedented shutdown of the strait, and a signal from Tehran of the potential fallout to the world economy if the US goes through with threats to attack it as tensions mount between the two countries.