Intensive diplomatic efforts are underway involving the United States, Iran, and regional intermediaries to secure a 45-day ceasefire that could open the door to ending the ongoing conflict, according to a report published Sunday night.

Despite the ongoing negotiations, sources familiar with the discussions indicated that the likelihood of reaching even a short-term agreement within the next 48 hours remains low. Still, officials involved view the talks as a last chance to prevent a sharp escalation that could include widespread attacks on Iranian civilian infrastructure and retaliatory strikes targeting energy and water facilities across the Gulf.

President Donald Trump recently adjusted his timeline for a deal, extending the deadline to “Tuesday, 8:00 P.M. Eastern Time” after previously giving Iran a 10-day window to reach an agreement.

Trump said the United States is actively engaged in negotiations and expressed cautious optimism that a resolution could still be achieved. “There is a good chance, but if they don’t make a deal, I am blowing up everything over there,” Trump said.

At the same time, Trump has made clear that failure to secure an agreement could lead to strikes on infrastructure vital to Iranian civilians. Iranian officials have responded with warnings that they would retaliate by targeting critical facilities in Israel and Gulf countries.

According to the report, a coordinated U.S.-Israel military plan aimed at Iran’s energy sector is already prepared, though the extension of the deadline is intended to allow one final attempt at diplomacy.

Negotiations are being carried out through mediators from Pakistan, Egypt, and Turkey, along with indirect communication between Trump envoy Steve Witkoff and Iranian Foreign Minister Abbas Araghchi.

A U.S. official involved in the process said that several proposals have been put before Iran in recent days, but none have been accepted so far.

Diplomats are working on a two-stage approach, beginning with a 45-day ceasefire that would allow for broader negotiations, with the possibility of extending the pause if progress is made. A second stage would aim at reaching a permanent resolution to the conflict.

Among the main obstacles are the reopening of the Strait of Hormuz and the issue of Iran’s stockpile of highly enriched uranium. Mediators are attempting to secure initial, limited concessions from Iran on these matters while also seeking assurances from the United States that any ceasefire would lead to a more lasting agreement.

Iranian leaders, however, have continued to project a defiant stance publicly, signaling reluctance to agree to major concessions under the current circumstances, the report said.