Iran said on Sunday that the United States has responded to Tehran's proposed 14-point plan aimed at ending the ongoing conflict, as Washington signaled dissatisfaction with the terms and tensions continued to ripple across the region and global energy markets.

Iranian Foreign Ministry spokesman Esmaeil Baghaei said in an interview with with state-run IRIB TV that the US reply is currently under review. He stressed that the proposal focuses solely on ending hostilities and does not address detailed nuclear issues.

"At present, we are focused on the parameters related to ending the war in the region, including Lebanon," Baghaei said, adding "we have no nuclear negotiation at this stage."

The United States has not formally confirmed its response. However, US President Donald Trump was quoted by Kan News as saying the Iranian proposal was "not acceptable."

"It's not acceptable to me. I've studied it, I've studied everything. It's not acceptable," Kan News quoted Trump as saying in a brief phone interview.

Trump added that the campaign is going "great."

He said that "the Iranians want to make a deal, but I'm not satisfied with what they've offered," adding that "there are things I can't agree to."

According to sources, Iran's latest proposal to the US consists of three phases.

Phase one focuses on de-escalation within 30 days, including transforming a ceasefire into a full cessation of hostilities, establishing an international mechanism to prevent renewed conflict and implementing a region-wide ceasefire involving Iran's allies and Israel. It also includes gradual reopening of the Strait of Hormuz, easing blockades on Iranian ports, mine clearance by Iran, US military withdrawal from surrounding waters and revisions to earlier compensation proposals.

Phase two addresses nuclear-related issues, including discussions on halting uranium enrichment for up to 15 years, after which Iran would resume enrichment under a "zero inventory" framework. The plan opposes dismantling Iran's nuclear facilities and suggests transferring or diluting existing highly enriched uranium stockpiles. It also includes phased sanctions relief.

Phase three envisions strategic dialogue between Iran and regional countries to establish a comprehensive regional security framework.

Earlier on Saturday, Iran's Deputy Foreign Minister for Legal and International Affairs Kazem Gharibabadi confirmed that Tehran had submitted its proposal for peace talks with the United States through Pakistan, leaving the decision to Washington to choose between diplomacy and confrontation.

Gharibabadi emphasized that Iran has always favored interest-based diplomacy but remains ready to repel any "aggression" against the country and its people.

Since joint US-Israeli strikes on Tehran on February 28, Iran has tightened control over the Strait of Hormuz, restricting passage for vessels linked to the US and Israel, while Washington has also imposed a naval blockade on Iranian ports.

On Sunday, Trump announced a new initiative dubbed "Project Freedom," aimed at assisting ships stranded in the waterway.

"For the good of Iran, the Middle East, and the United States, we have told these Countries that we will guide their Ships safely out of these restricted Waterways, so that they can freely and ably get on with their business," he said in a post on social media without specifying which countries.

He added the operation would begin on Monday and warning that any interference would be "dealt with forcefully."

Amid mounting pressure on global energy supply, the Organization of the Petroleum Exporting Countries (OPEC) and its allies announced a production increase on Sunday.

Seven major "OPEC+" producers - Saudi Arabia, Russia, Iraq, Kuwait, Kazakhstan, Algeria and Oman - agreed to raise output by 188,000 barrels per day in June. The move marks the group's third consecutive monthly increase and its first decision following the United Arab Emirates' formal exit.

In a statement, the group said it would act cautiously to maintain market stability and adjust production flexibly in response to evolving conditions.