<span style="color: #222222;">United States President Donald Trump said yesterday that his administration has not ruled out imposing sanctions on Turkey over its purchase of a Russian air defence system.<br />''<br />''The remarks came a day after Trump Administration said that USA would not sell the F-35 fighter jets to Turkey after Ankara purchased the S-400 from sanctions-hit Russia.<br />''<br />''Turkey, a member of the North Atlantic Treaty Organization received the first batch of the Russian missile defence system last Friday despite repeated warnings from Washington against the purchase.<br />''<br />''The US has imposed a series of sanctions on Russian individuals, companies and government agencies over Moscow's military intervention in Ukraine. Under current US laws, any country purchasing a major defence equipment from Russia could be subject to American sanctions.</span><br />