Iran's judiciary has previously promised speedy trials and executions for those arrested during the ongoing protests against the regime.
On Wednesday, U.S. time, however, Foreign Minister Abbas Araghchi said in a Fox News interview that no executions were planned.
"I'm sure there are no plans for hangings at all," he said.
At the same time, Donald Trump announced that he had been informed that the killings in Iran "have stopped or are stopping."
"And there are no plans for executions," the president said.
"If that happens, we will all be very upset," he added.
On Wednesday, it was feared that arrested protester Erfan Soltani would be executed, after his family said they had been informed of an imminent execution. But the sentence has not been carried out, and on Thursday, Iran's chief judge claimed in state-run Iranian media that the 26-year-old had been arrested but not sentenced to death.
Thousands of people are reported to have been killed in the regime's crackdown on protests that have raged since late December. Estimates from human rights organizations in exile suggest that between 3,000 and 12,000 protesters have been killed.
Araghchi called the allegations baseless. On Fox News, he said the death toll is "only" in the "few hundred."
The UN Security Council has called a meeting at 9 p.m. local time in Sweden on Thursday at the request of the United States to discuss the situation in Iran. The country remains in a blackout, with virtually no internet or telephone access for the past six days.
