The family of detained Iranian protester Erfan Soltani have said his execution was postponed, as US President Donald Trump said he had received assurances that the "killing has stopped".
"We were told that the killing in Iran is stopping, and there's no plan for executions," Trump said from the Oval Office on Wednesday (Thursday AEST) after earlier warning Iran against executing protesters.
"The killing has stopped. The executions have stopped."
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The State Department and a family member had raised the prospect that Iran could execute Soltani, 26, who was detained less than a week ago for joining anti-government demonstrations.
A member of Soltani's family called Somayeh told CNN on Wednesday that the execution had not taken place as planned, but added that it had not been cancelled and the family was waiting for more information.
She said the outcome was "definitely" influenced by Trump's involvement in the case.
Hengaw, a Norway-based human rights organisation, also reported late on Wednesday that Soltani's execution had been postponed.
"There's no plan for executions or an execution," Trump told reporters on Wednesday.
"I've been told that on good authority. We'll find out about it. I'm sure if it happens, I'll be very upset." Trump did not immediately elaborate on the source of his information.
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Iran's judiciary on Thursday, however, indicated that Soltani had not been sentenced to death, according to state broadcaster IRIB. It quoted Iran's Judiciary Media Centre as saying such reports were "fabricated news".
The judiciary said Soltani was arrested on January 10 and formally charged with "assembly and collusion against the country's internal security" as well as "propaganda activities" against the regime, according to IRIB.
Even if he his charges were substantiated, the judiciary claimed he would not be sentenced to death because that penalty did not apply to his charges.
He is being held at the Central Prison of Karaj, about 42 kilometres northwest of Tehran, the judiciary statement said.
A "warm-hearted young man"
In a Tuesday post on X, the State Department said Iranian authorities planned to execute Soltani, who was arrested at his home last week in connection with protests in Fardis, a city about 25 miles west of Tehran.
"More than 10,600 Iranians have been arrested by the Islamic Republic regime simply for demanding their basic rights. Erfan Soltani, 26, whose death sentence was issued for January 14, is among them," the State Department said.
Speaking to CNN on Tuesday, Somayeh, who declined to be identified by her full name due to security concerns, said Soltani was an "incredibly kind and warm-hearted young man" who had "always fought for the freedom of Iran".
Soltani was not allowed a lawyer or an appeal after being sentenced to death, according to Somayeh, who said that his trial was rushed.
Rushed death sentences and sham trials are a common occurrence in Iran, according to regional experts.
"This time, the Islamic Republic regime didn't even bother with its usual 10-minute sham trial," the US State Department said in a post on X.
In an interview with Fox News that aired on Wednesday, Iran's foreign minister Abbas Araghchi said hanging protesters was "out of the question."
"I can tell you I'm confident about that, there is no plan for hanging at all," he said, adding that reports to the contrary were part of a "misinformation campaign" aimed to "provoke President Trump and to drag him into this question which could have disastrous consequences."
Iranian Attorney General Mohammad Movahedi Azad said over the weekend that legal proceedings against protesters, whom he called "terrorists," will be carried out "without leniency, mercy or appeasement," according to the semi-official news agency Tasnim.
On Wednesday, Iran's Islamic Revolutionary Guard Corps (IRGC) said its intelligence network has received nearly 400,000 public reports, leading in some cases to arrests.
Denied access to case
Hengaw reported that Soltani was arrested at his home last Thursday. Four days after his arrest, his family was told that his execution had been scheduled, it said.
Soltani's family has been denied access to any information regarding his case, including the charges against him, Hengaw reported Monday. His sister, a licensed lawyer, has tried to pursue the case, "but authorities have so far prevented her from accessing the case file," the organisation said.
His family has been granted only "a brief opportunity for a final visit" before his execution, according to Hengaw.
The feared execution figured in growing tensions between the US and Iran, with Trump considering taking military action against the regime.
On Tuesday, Trump warned Iran against executing protesters and said the US would take "strong action" in response.
"If they do such a thing, we will take very strong action," the president told CBS News in an interview, without expanding on what that action would be. Trump told CBS that he had not heard reports about hangings, but he warned that such a development could prompt a forceful US response.
"We don't want to see what's happening in Iran happen. And you know, if they want to have protests, that's one thing. When they start killing thousands of people, and now you're telling me about hanging, we'll see how that works out for them," Trump said.
"It's not going to work out good."
Somayeh, the family member, called on Trump for help.
"Our demand now is that Trump truly stand behind the words he said, because the Iranian people came to the streets based on those statements," she told CNN on Tuesday.
"An unarmed population trusted these words and is now under gunfire. I beg you, please do not let Erfan be executed. Please."
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