The US is watching Iran, US President Donald Trump told reporters on Air Force One, while returning from the World Economic Forum in Davos, Switzerland, the BBC reports.

According to Trump, many US warships are moving in that direction, and they are sending a large force towards Iran. The US president described them as an armada and a huge fleet, but added that they may not have to be used.

Last week, Trump withdrew his threat to strike Iran after the White House reported that Tehran had stopped planned executions of protesters, AFP recalled.