Qatari mediators returned to Tehran on Friday, October 30, in a renewed effort to secure an agreement between the United States and Iran, according to an official briefed on the negotiations.
The diplomatic initiative has been coordinated with Washington and comes amid continued efforts to revive negotiations aimed at ending the conflict.
Qatar presented a draft peace plan to Iran on Sunday, but a senior Iranian official rejected the proposals as unacceptable, maintaining Tehran's existing nuclear position.
Washington insists that nuclear issues be addressed from the beginning of negotiations, while Tehran demands that the United States first end its port blockade and lift sanctions on Iranian oil exports.
Iranian Foreign Minister Abbas Araqchi said Wednesday that Tehran remained in close contact with intermediaries to examine proposals supporting implementation of Iran's seven-day plan to end the regional war.
The latest diplomatic push follows months of negotiations marked by disagreements over security arrangements and economic restrictions.
The Wall Street Journal reported Wednesday that US Vice President JD Vance had sent a letter to Iranian security chief Mohsen Rezaei seeking to revive stalled negotiations.
A senior Iranian official told Fars News Agency on Thursday that Tehran had received the message but had not responded.
President Donald Trump subsequently said Vance's outreach concerned medical supplies.
The conflict began with US and Israeli strikes against Iran on February 28, followed by Iranian retaliatory attacks targeting Israel and American positions across several Arab countries.
Washington and Tehran signed a framework agreement in June and subsequently entered negotiations, which collapsed over disagreements concerning navigation through the Strait of Hormuz.
Qatar's latest mediation effort seeks to bridge those unresolved differences as diplomatic contacts continue.