Donald Trump has reignited his threats against Iran just weeks after launching military strikes against the county's three main nuclear sites.
Trump told Tehran that if it kept working towards nuclear enrichment, something which has been a line in the sand for the US administration, he would have no choice but to act.
Speaking during a news conference in Scotland alongside Sir Keir Starmer, the President said Iran was "sending very bad signals, very nasty signals" which "they shouldn't be doing".
He blasted: "We wiped out their nuclear possibilities.
"They can start again... If they do, we'll wipe it out faster than you can wave your finger at it."
Trump continued: "We will do that gladly - openly and gladly."
His statements followed Iran's Foreign Minister Abbas Araghchi again vowing Iran had a right to enrich uranium for "medical and civilian purposes" ahead of talks with the UK, France and Germany last week.
Donald Trump has reignited his threats against Iran, just weeks after launching military strikes against the county's three main nuclear sites
|GETTY
The talks were described by Iranian officials as "serious, frank and detailed" - but brought no major breakthroughs.
And after Trump's comments on Monday, Araghchi said that Iran will "never respond to the language of threat and intimidation".
Tehran "will not hesitate to react in a more decisive manner" if it is attacked again, he spat.
In the meantime, Israeli officials have also signalled a willingness to restart attacks on Iran.
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The US President said Iran was 'sending very bad signals, very nasty signals' which 'they shouldn't be doing'
|GETTY
Israeli Defence Minister Israel Katz said on Sunday that he wanted to send a message to Iran's Supreme Leader, Ayatollah Ali Khamenei.
"If you continue to threaten Israel, our long arm will reach Tehran again with even greater power - and this time personally to you, too," he said.
Experts have said US approval would be all but required for an Israeli attacks on Iran, however.
After the attacks on June 22, Trump hailed the US as having "obliterated" Iran's nuclear programme.
But more recent intelligence reports have suggested the damage may have been less significant, and only set the programme back by a short time.
Trump has since branded Tehran's persistence in continuing to pursue its nuclear programme "stupid".
Also over the weekend, the US President said he was going to reduce the 50-day deadline which he had previously implemented on Vladimir Putin to end the Ukraine war.
He had threatened to impose "very severe" tariffs on Russia's main trading partners, including China and India, if Putin did not agree to a ceasefire by September 5.
And speaking to reporters alongside Starmer on Monday, Trump revealed: "We're going to have to look and I'm going to reduce that 50 days that I gave him to a lesser number, because I think I already know the answer, what's going to happen."
He also said he was "disappointed in President Putin", adding: "We thought we had that settled numerous times, and then President Putin goes out and starts launching rockets into some city like Kyiv and kills a lot of people in a nursing home or whatever.
"You have bodies lying all over the street, and I say that's not the way to do it.
"So we'll see what happens with that."