Iran's foreign ministry spokesman Esmaeil Baqaei, however, said the visit did not necessarily mean "we have reached a turning point or a decisive situation". The disagreements between Iran and the United States were "deep and extensive", he added in quotes carried by Iran's ISNA news agency.US Secretary of State Marco Rubio had earlier voiced hope of progress on ending the war, which broke out on February 28 when the US and Israel launched attacks against Iran.A ceasefire on April 8 halted the conflict, but negotiation efforts, including historic face to face talks hosted in Islamabad have so far failed to yield a lasting agreement.Previous comments by President Donald Trump had suggested weeks of stop-start negotiations to strike a permanent end to the war were teetering on the "borderline" between a deal and renewed attacks.Pakistan's military said in a statement that Munir had "arrived in Tehran as part of ongoing mediation efforts".It said he had been welcomed by Iran's Interior Minister Eskandar Momeni and Pakistani counterpart Mohsin Naqvi.Naqvi visited Iran for the second time in a week on Wednesday and met President Masoud Pezeshkian and Foreign Minister Abbas Araghchi.Baqaei said a delegation from Qatar had also held talks with the Iranian foreign minister on Friday."In recent days, many countries -- both regional and non-regional -- have been trying to help bring the war to an end... However, Pakistan remains the official mediator."Pakistan, Iran's eastern neighbour, hosted in April the only direct negotiations between US and Iranian officials to take place since the war began.Munir was at the centre of the action during that round of talks, greeting both delegations on their arrival and displaying bonhomie with US Vice President JD Vance.But the talks ultimately failed, with Iran accusing the US of making "excessive demands".Since then, the two sides have exchanged multiple proposals, with the threat of renewed war looming all along.Hormuz