US President Donald Trump has threatened that Iran will be “blown off the face of the Earth” if they attack US vessels carrying out “Project Freedom” in the Strait of Hormuz, Al Jazeera reports.

The US president tells Fox News he believes Iran has become “much more malleable” in peace negotiations and emphasises that the US military build-up in the region is continuing.

“We have more weapons and ammunition at a much higher grade than we had before,” Trump tells Fox News’ Trey Yingst.

“We have the best equipment. We have stuff all over the world. We have these bases all over the world. They’re all stocked up with equipment. We can use all of that stuff, and we will, if we need it.”