U.S. President Donald Trump has said an attack on Syria "could be very soon or not so soon at all."

"Never said when an attack on Syria would take place. Could be very soon or not so soon at all! In any event, the United States, under my Administration, has done a great job of ridding the region of ISIS. Where is our 'Thank you America?'" he wrote on Twitter on April 12, 2018.

As UNIAN reported earlier, two U.S. Navy destroyers armed with Tomahawk cruise missiles are in position and ready to be called into action, among other assets including jets and submarines should President Donald Trump make good on his threat to order a military strike on targets in Syria.