Iran says the Strait of Hormuz is an inviolable "red line", warning that if US President Donald Trump carries out his threat to attack Iran's infrastructure, it will strike all infrastructure across the Gulf region.

On social media, an Iranian official said his country would be Strait's guardian "forever."

Iran's Islamic Revolutionary Guard Corps (IRGC) said on Wednesday that the Strait of Hormuz would remain closed "until the end of America's evils", while warning that other oil…