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ISLAMABAD: The announcement of the US-Iran peace deal came after talks nearly collapsed several times, including on the final night.

Two sources and a diplomat briefed on the negotiations said securing the framework deal required Qatar to step in.

Disagreements sometimes came down to single words, such as a 45-minute debate in late May on whether the text should use “etc.” or “including”, the diplomat said, without describing which clause the debate referred to.

Achieving a final settlement on issues including sanctions relief and management of the strait as well as restrictions on Iran’s nuclear programme – all while Washington and Tehran distrust each other’s intentions – could prove even more challenging.