The United States and Iran have made good progress towards a ceasefire extension deal but President Donald Trump is not yet ready to approve it, US Vice President JD Vance said, AFP reports.

“We’re going back and forth on a couple of language points. We’ve made a lot of progress here,” Vance told reporters, hours after US sources said Washington and Tehran had agreed a deal.

“Hopefully, we’ll continue to make progress and the president will be in a position where he can endorse the agreement, but obviously that’s still TBD (to be determined),” he added.