"The next step for me is to present draft of possible deal to my counterparts in the US. I believe that in the next two, three days, that would be ready, and after final confirmation by my superiors, that would be handed over to Steve Witkoff," Araghchi said in an interview published online on Friday with the Morning Joe show on US TV network MSNBC.

Trump said on Thursday that Iran had at most 15 days to make a deal on concerns starting with its nuclear programme, suggesting the United States would attack if it did not.

"Well, I have to say that first of all, there is no ultimatum. We only talk with each other how we can have a fast deal. And a fast deal is something that both sides are interested about," Araghchi said.