"We'll see what happens with Iran. If they do anything, it will be a very bad mistake," Trump told reporters at the White House.  Trump's comments came after the United Arab Emirates reported four commercial vessels had been sabotaged on Sunday near Fujairah emirate just outside the Strait of Hormuz. Iran sought to distance itself from the incident.

The US is increasing pressure on Iran in recent days after US intelligence suggested Tehran was planning to attack US interests in the region. But Trump still left open the door for dialogues with Iran. US envoy to Iran Brian Hook said the US believed that Iran should take part in dialogues instead of adopting a threatening posture.