WASHINGTON, June 3. /TASS/. US President Donald Trump said that the negotiations between Washington and Tehran were going well, and an agreement could be reached as early as this weekend, although he did not rule out a failure.

"I hear the negotiation itself has gone very well, actually, very well," Trump said. "I mean, if it happens, and it might not happen, who knows? But if it happens, it could happen, like over the weekend."