NEW YORK - The United States and Iran are signaling renewed openness to diplomacy Tuesday as world leaders gather for the United Nations General Assembly, creating the possibility of new talks aimed at easing a conflict that has disrupted energy markets, threatened major shipping routes and placed U.S. forces and allies across the Middle East under pressure.

Secretary of State Marco Rubio said Tuesday that the United States is open to speaking with Iranian officials during the gathering in New York, although no meeting had been scheduled as of Tuesday morning.

Rubio said Washington would consider discussions if there were prospects for a positive outcome, while reiterating the U.S. position that Iran must not obtain a nuclear weapon.

Iran is also signaling interest in reopening negotiations.

A senior Iranian official told Reuters that Iran's delegation to the General Assembly has full authority to revive diplomacy with Washington. The official said there were no current plans for President Donald Trump and Iranian President Masoud Pezeshkian to meet directly.

Both presidents are attending the General Assembly, making this the first U.N. gathering attended by both leaders since the United States and Israel launched military operations against Iran in February.

Iran offers path to reopening Strait of Hormuz

At the center of the potential negotiations is the Strait of Hormuz, one of the world's most important energy shipping routes.

Iran has told mediators it could reopen the strait to Gulf shipping within seven days if the United States eases military pressure and lifts its blockade on Iranian ports, according to Reuters.

A senior Iranian official said Tehran sent its latest proposal to Washington through intermediaries last week.

Before the current conflict, approximately one-fifth of global oil and liquefied natural gas supplies moved through the Strait of Hormuz, making disruptions there significant for energy prices and international trade.

The strait connects the Persian Gulf with the Gulf of Oman and provides a critical export route for major energy producers including Saudi Arabia, the United Arab Emirates, Kuwait, Qatar and Iraq.

Any agreement that restores more reliable shipping through Hormuz could therefore have consequences well beyond the region, including for U.S. gasoline, diesel and transportation costs.

Oil markets were already reacting Tuesday to the possibility of improved Gulf supplies.

Brent crude futures for November fell more than 2% Tuesday morning to about $98 per barrel, while U.S. West Texas Intermediate futures also declined as traders evaluated Iran's proposal and improving prospects for Saudi exports.

The market reaction does not mean an agreement has been reached. Significant differences between Washington and Tehran remain, and no formal U.S.-Iran negotiating session has been announced.

Trump meeting Gulf leaders

President Trump is also scheduled to meet Tuesday with leaders from Bahrain, Kuwait, Qatar, Oman, Saudi Arabia and the United Arab Emirates.

Those countries have a direct interest in restoring stable shipping through Hormuz while also confronting security threats linked to the broader regional conflict.

Several Gulf countries host major U.S. military installations and have faced attacks during the confrontation with Iran.

Qatar has also proposed a broader regional security framework that could include Iran and the Arab Gulf states. Regional sources told Reuters that Iran is reviewing the proposal.

The diplomatic activity comes as the 81st session of the United Nations General Assembly begins its general debate in New York. World leaders are gathering at U.N. headquarters from Sept. 22 through Sept. 28.

Houthi advances add another pressure point

At the same time Washington and Tehran consider whether to restart negotiations, fighting in Yemen is adding another source of instability.

Iran-aligned Houthi forces have made significant advances along Yemen's Red Sea coast and near the Bab el-Mandeb Strait, another critical international shipping route.

The Houthis have defeated forces aligned with Yemen's Saudi-backed government in several areas and are pushing toward strategic positions overlooking the Red Sea coast.

The Bab el-Mandeb connects the Red Sea with the Gulf of Aden and serves as a gateway for ships traveling between the Indian Ocean and the Suez Canal.

Control or disruption of shipping around both Bab el-Mandeb and the Strait of Hormuz would place two of the world's most important maritime chokepoints at the center of the same regional confrontation.

Houthi forces have also launched missiles and drones toward Saudi Arabia, raising concerns in Riyadh about oil exports and border security.

The United States has so far avoided directly reentering the military campaign against the Houthis despite requests for additional support from Saudi Arabia.

Rubio said Tuesday that the United States would continue supporting Saudi Arabia but described the conflict involving the Houthis as dangerous and complex.

G7 foreign ministers meeting on the sidelines of the United Nations gathering also called on Iran to stop arming and supporting the Houthis.

In a joint statement, the ministers from the United States, Britain, Canada, France, Germany, Italy and Japan condemned Houthi strikes in Yemen and against Saudi Arabia and called for an end to attacks and threats against civilian shipping.

Shipping and energy markets closely watching New York

The combination of potential U.S.-Iran diplomacy and escalating fighting in Yemen means developments at the United Nations could quickly affect markets and security decisions outside New York.

A diplomatic breakthrough could increase expectations that shipping through Hormuz will normalize and reduce pressure on global energy supplies.

A collapse in talks or new military escalation could have the opposite effect, increasing risks to U.S. forces, Gulf allies, commercial vessels and energy infrastructure.

Saudi Arabia has also restarted operations at its East-West Pipeline, which allows crude oil to move from fields in the country's east to the Red Sea without passing through the Strait of Hormuz.

The pipeline had been shut following attacks earlier this month. Reuters reported Tuesday that Saudi Arabia could resume exports from its Red Sea port of Yanbu at reduced volumes.

Saudi Aramco has meanwhile increased shipments through Hormuz, with tanker-tracking data showing approximately 14 million barrels of Saudi crude loaded onto seven supertankers inside the Gulf on Sunday.

What happens next

The immediate question is whether the public expressions of openness from Washington and Tehran result in an actual meeting during the General Assembly.

As of Tuesday morning, U.S. officials said no meeting with Iranian officials was scheduled.

Iran's delegation, however, has reportedly arrived with authority to negotiate, and Tehran has already sent a proposal through intermediaries outlining conditions under which it says the Strait of Hormuz could reopen.

Trump's meetings with Gulf leaders could also shape the U.S. position, particularly as Saudi Arabia and other governments seek both restored shipping routes and stronger security guarantees.

For the United States, the stakes extend from military security in the Middle East to fuel prices and international commerce.

The coming hours in New York could determine whether the latest diplomatic opening develops into formal negotiations or becomes another short-lived attempt to contain a conflict that continues to affect two of the world's most important maritime trade routes.