WASHINGTON- United States President Donald Trump reportedly authorised US Cyber Command to launched a cyber attack against Iran missile control systems and spy network after Tehran downed an American surveillance drone.

Trump also announced that he will impose additional sanctions on Iran today.

According to Washington Post, the cyber-attack crippled down computer systems that are being used for rocket and missile launches. United States also deployed a spying group to track ships in Oman Gulf.

However, Iran shrugged off the said attack by the US because it was “still not clear whether the attacks were effective or not,” and suggested the US media reports were a “bluff meant to affect public opinion and regain lost reputation for the White House” following the downing of its drone.

Trump on Saturday backed out from his plans for a retaliatory military strike claiming that it wouldn’t be “proportionate” and the response may kill 150 people.

US National Security Advisor John Bolton already warned Tehran that they should not misinterpret Trump’s “prudence and discretion for weakness.”

“Neither Iran nor any other hostile actor should mistake U.S. prudence and discretion for weakness,” Bolton said. “No one has granted them a hunting license in the Middle East.”