ISLAMABAD — Pakistani, Saudi and Egyptian envoys have spent the past 72 hours shuttling between capitals to test whether a narrow opening for Iran talks can be widened, officials in three governments confirmed Wednesday, even as strikes between Iran and Israel continued and the U.S. military reported additional casualties from Houthi attacks in the Red Sea.

The unannounced choreography — described by diplomats as “pre-negotiation about negotiations” — has not yet produced a structured forum. But it represents the most concerted mediation push since the war erupted a month ago, and is being watched closely in Washington, where senior officials say President Donald Trump is open to a pause but unwilling to be seen pressing Israel into one.

“There is a thread, and we are pulling on it carefully,” said Bilal Anwar, a senior adviser to Pakistan’s foreign ministry, in a briefing to local reporters in Islamabad. “No one is announcing a venue. No one is announcing a date. What we are doing is trying to align the questions before anyone has to answer them.”

The shuttle has unfolded against the backdrop of an emergency OPEC+ session in Vienna, where ministers earlier Wednesday agreed to lift production by roughly 1.5 million barrels per day to ease pressure on consuming economies. Brent crude, which touched $125 last week, eased back below $115 in afternoon trading. Saudi Arabia’s willingness to absorb the political cost of opening the spigots, analysts said, signaled Riyadh’s parallel investment in cooling the conflict on the diplomatic track as well.

“The Saudis are not freelancing — they are coordinating,” said Layla Hassan, a Beirut-based regional analyst at the Levant Policy Forum. “Vienna and Islamabad are the same play. Riyadh is telling Tehran: we are giving you an off-ramp economically and politically in the same week. Take the meeting.”

According to two Gulf officials who spoke on condition of anonymity to describe private exchanges, Pakistani Foreign Minister Ishaq Dar traveled to Riyadh on Sunday for an unannounced meeting with Saudi Foreign Minister Prince Faisal bin Farhan, then flew to Cairo on Monday for talks with Egyptian counterpart Badr Abdelatty. A Pakistani delegation followed up Tuesday with a quiet visit to Muscat, where Omani intermediaries have for years passed messages between Tehran and Washington.

Iranian Foreign Minister Abbas Araghchi, in a televised statement from Tehran on Wednesday evening, did not confirm the contacts but said Iran would consider “any honest proposal that does not impose surrender as a precondition.” He coupled the remark with a vow that Iran would continue to respond to Israeli strikes “in proportion and in kind.” Israeli officials, in turn, said operations against Iranian nuclear and industrial sites would not pause for diplomacy.

In Washington, the State Department declined to characterize the back-channel activity, but a senior administration official, speaking on condition of anonymity, said the U.S. had been “kept informed at the principals’ level” and was “neither encouraging nor discouraging” the mediators. The official said any framework would have to address what Washington called “the architecture of escalation” — Houthi attacks on shipping, Iraqi militia rocketry, and Hezbollah’s posture on Israel’s northern border — and not merely the bilateral exchange of fire.

That insistence has emerged as the principal sticking point. Iranian officials, according to two diplomats briefed on the exchanges, are willing to discuss a conditional halt to Israel-bound missile launches but balk at being held responsible for the actions of allied groups they say they do not command. Saudi and Egyptian mediators have begun drafting what one called “framework principles” — a short text designed to set the terms of any future meeting without committing parties to outcomes.

“It is the oldest trick in mediation: write the table of contents first, fight about the chapters later,” said John Reilly, a senior fellow at the Atlantic Council who has advised past U.S. negotiating teams. “If they can get a one-page document everyone can live with by the weekend, that is a real foundation.”

European capitals have signaled support without seeking a seat at the table. French Foreign Minister Jean-Noel Barrot, speaking after a meeting in Brussels, said France would “amplify, not duplicate” the Islamabad track. EU foreign policy chief Kaja Kallas said the bloc was prepared to underwrite humanitarian corridors and verification mechanisms if asked.

The diplomacy is unfolding even as the war intensifies on multiple fronts. The Pentagon on Wednesday confirmed the deaths of three additional U.S. sailors from a Houthi drone strike on a destroyer escorting commercial traffic near the Bab el-Mandeb, bringing the U.S. military death toll since the start of hostilities to about 340. Saudi and Emirati air defenses intercepted a wave of projectiles overnight. In northern Israel, Iron Dome batteries engaged what the Israel Defense Forces described as a “complex barrage” from southern Lebanon.

Inside Iran, the cost is mounting. A senior European intelligence official said sustained Israeli strikes on the country’s enrichment infrastructure and on dual-use industrial sites had begun to bite into the regime’s strategic options, while sanctions imposed in the war’s opening week have constrained its ability to finance reconstruction. “The leadership is not on its knees, but the leadership is doing math,” the official said.

Whether that arithmetic produces a meeting in the coming days remains uncertain. Mediators cautioned against assuming the back channels would survive a single bad week on the battlefield. Pakistani officials said they intended to host a more formal exchange in Islamabad in the second week of April if the framework principles held.

“We are not optimists,” Anwar said. “We are practitioners. The optimism comes later, if at all.”

Officials in Riyadh and Cairo said additional consultations would be announced once the parties were prepared to be named publicly.