WASHINGTON — A flurry of diplomatic activity, including visits by Pakistani and Qatari officials to Tehran on Friday, is signaling possible momentum in efforts to reach a deal between the United States and Iran.Pakistan’s army chief, Asim Munir, reportedly departed for the Iranian capital, where the country’s interior minister, Mohsin Naqvi, arrived earlier this week. Naqvi and Iranian Foreign Minister Abbas Araghchi met Friday to discuss proposals to end the war, the semi-official Tasnim news agency reported.Pakistan has served as the primary mediator between the two sides, hosting one round of talks in mid-April. Qatar, which previously brokered talks between Washington and Tehran, also dispatched a negotiating team to Tehran on Friday, according to Reuters.The United States and Iran have exchanged multiple proposals to end the war, but major sticking points remain, including Tehran’s insistence on maintaining its nuclear program and control over the Strait of Hormuz.Earlier this week, President Donald Trump said he called off planned strikes on Iran at the request of Gulf allies because “serious negotiations” were underway over a potential deal. On Friday, Secretary of State Marco Rubio said there had been “a little bit of movement” in the talks with Iran, but that he did not want to overstate the progress.This is a developing story and will be updated.