U.S. President Donald Trump has ordered additional sanctions against Iran after receiving reports that Tehran is most likely responsible for Saturday's attacks on Saudi Arabia's oil facilities. The president said Wednesday that he had directed Treasury Secretary Steven Mnuchin to stiffen existing sanctions. He also named his fourth national security adviser Wednesday. VOA's Zlatica Hoke reports. Originally published at - https://morigin.voanews.eu/a/trump-orders-new-very-significant-sanctions-on-iran-/5089662.html