IRAN was subjected to a cyber-attack by the US on Thursday, with President Donald Trump saying new sanctions would be announced later tomorrow.

Mr Trump pulled out of missile strikes on Tehran in retaliation for the shooting down of a US spy drone which may have encroached on Iranian airspace.

Hawkish US National Security Adviser John Bolton, who is leading the charge for war on Iran and other countries, said Iran shouldn’t “mistake US prudence and discretion for weakness.”

Speaking in Jerusalem, alongside Israeli Prime Minister Benjamin Netanyahu, Mr Bolton said no-one had granted Iran a “hunting licence in the Middle East” and warned that the US reserves the right to attack it at a later point.

The cyber-attack, which was admitted by several US officials on condition of anonymity, was reported to have disabled Iranian computer systems that control rocket and missile launchers.

The US Department of Homeland Security claims that “Iranian regime actors and their proxies” are stepping up their own “malicious cyberactivity.”

This has reportedly targeted US naval ship systems, government departments and US industries.

Mr Trump tweeted: “Iran cannot have nuclear weapons! Under the terrible Obama plan, they would have been on their way to nuclear in a short number of years, and existing verification is not acceptable.

“We are putting major additional sanctions on Iran on Monday. I look forward to the day that sanctions come off Iran, and they become a productive and prosperous nation again — The sooner the better!”

Echoing his 2016 election campaign slogan, he added: “Let’s make Iran great again.”

He has previously said he does not want war with Iran, although he promised to “obliterate” the country should a conflict start.

However Iranian General Gholamali Ali Rashid warned the Trump administration that the scope and duration of any war could not be controlled.

It “should behave in a responsible way to protect the lives of American forces,” he said.