Pakistani officials are expecting a “major breakthrough” in talks between Iran and the United States on Tehran’s nuclear programme, sources have told Al Jazeera, as Islamabad steps up diplomatic efforts to end a war that has killed thousands of people.The optimism on Wednesday came as a high-level Pakistani delegation, headed by Army Chief Asim Munir, arrived in Tehran to deliver a message from the US to the Iranian leadership, according to Iran’s Press TV broadcaster.Recommended Stories list of 4 itemsend of listHe was received by Iran’s Foreign Minister Abbas Araghchi, who expressed gratitude for Pakistan’s “gracious hosting of dialogue”. According to Press TV, Munir is also seeking to lay the groundwork for a second round of talks between the US and Iran.Al Jazeera’s Osama Bin Javaid, who has been covering the US-Iran talks, said Pakistani officials were expecting “a major breakthrough on the nuclear front” and that the delegates were continuing to relay messages back and forth between Washington and Tehran.The central sticking point remains the duration of any enrichment freeze by Iran and the country’s stockpile of 440 kilogrammes of highly enriched uranium.“We know that both sides are essentially stuck on between five years of no enrichment to 20 years of no enrichment. And there is a solution in the middle,” Bin Javaid said.“There’s also talk about what Iran will do with the 440kg of nuclear-enriched material that it has in the country. There are multiple options – whether sending it abroad to a third party or bringing it down to either uranium in its natural form or up to 3 percen …
