Iran chief negotiator says no deal with US until Iranian rights secured

Iran's chief negotiator Mohammad Bagher Ghalibaf said on Sunday that Tehran will not agree to any deal with the United States that fails to secure the rights of Iranians.

"We will not approve any agreement until we are certain that the rights of the Iranian people have been upheld," Ghalibaf said, in a video broadcast on state television.

U.S. President Donald Trump said he had secured guarantees from Iran that it would not develop nuclear weapons, as reports emerged he had sent a tougher peace proposal back to Tehran.

Any tweaks to the proposal could prolong even further an agreement to formally end the Middle East war and open the Strait of Hormuz maritime route after weeks of efforts to secure a deal despite fractious rhetoric and the occasional flare up of armed conflict.