"I haven't heard about the hanging. If they hang them, you're going to see some things... We will take very strong action if they do such a thing," Trump told CBS News in an interview.
He said he's cutting off the prospect of talks with Iranian officials amid a protest crackdown and told Iranian citizens "help is on its way".
Trump did not offer any details about what the help would entail but it comes after the Republican president just days ago said Iran wants to negotiate with Washington after his threat to strike the Islamic Republic, where the death toll from nationwide protests has spiked to more than 2,000, according to human rights monitors.
