As uncertainty deepens again over a potential deal between the United States and Iran, Tehran has sent a clear message that no agreement is possible until Iranian rights are fully protected. As news emerged that US President Donald Trump had presented Iran with a new and tough proposal, Iran's top negotiators have reiterated their distrust of Washington.

Iran's senior leader Mohammad Bagher Ghalib said on Sunday that the United States cannot be easily trusted and that no deal will be ratified until the rights of the Iranian people are guaranteed. His comments came after the New York Times and Axios reported that the Trump administration had sent Iran a revised "tough" proposal. However, details of the proposal have not yet been made public.

The potential deal is widely seen as aiming to formally end the Middle East war, defuse regional tensions and reopen the Strait of Hormuz, which is crucial for global energy supplies. But any changes to the draft could drag out the talks and deepen long-standing mistrust.

Iran has been engaged in talks with the United States since February about the future of its nuclear program. But air and missile strikes by the United States and Israel have since severely damaged several senior security and political leaders in the Islamic Republic. Relations between the two sides have since become increasingly strained.

Tehran has repeatedly insisted its nuclear program is purely for civilian purposes. But the United States and its Western allies suspect Iran is ultimately seeking to develop nuclear weapons.

Trump has said his priority is to prevent Iran from developing any nuclear weapons and to reopen the Strait of Hormuz, which has been blocked since the war began. "I want to make sure there are no nuclear weapons there," he told his daughter-in-law, Lara Trump, in an interview on Fox News with his daughter-in-law, Lara Trump. "They agreed to that, it was very interesting."

But Tehran has long been skeptical of Trump's claims. There are signs that the two sides are still far apart on key contentious issues.

In a video message broadcast on state television, Ghalibaf said, "We will not accept any agreement until the rights of the Iranian people are guaranteed to be protected."

According to the Tasnim news agency, the process of exchanging texts on the talks is ongoing and both sides are regularly proposing amendments. Iranian Foreign Minister Abbas Araghchi also said that many of the claims that have come out are just speculation until a final conclusion is reached.

According to Iranian media, Tehran has demanded that about $12 billion worth of frozen assets be released before moving forward with substantive nuclear talks. In addition, Iran has rejected Trump's previous comments that it should destroy its enriched uranium stockpile as "baseless."

Meanwhile, new facts have also emerged in the military field. Washington has said that one of the declared objectives of the war is to destroy Iran's ballistic missile program. Top US military official General Dan Kean claimed in April that more than 80 percent of Iran's missile infrastructure had been attacked.

But according to a report by the American media outlet CNN on Sunday, satellite image analysis shows a different picture. According to the report, Tehran has succeeded in re-excavating more than 50 of the 69 tunnel entrances to the 18 underground missile sites affected by the US attack.

Daily attacks have decreased in Iran and across the Gulf since a temporary ceasefire between Tehran and Washington in April. However, complete peace has not been achieved and sporadic incidents continue.

According to Iran's state broadcaster IRIB, the Iranian Revolutionary Guards have claimed to have shot down a US military drone that was "about to enter Iranian territorial waters." The US has not confirmed the incident.

The Strait of Hormuz, a major route for global oil supplies, is also at the center of the current negotiations. Pressure is mounting on Trump to reach an agreement to remove US and Iranian blockades around the strait and normalize maritime traffic.

Trump had claimed that Iran would not charge any fees to ships using the strait under the potential deal. But Iranian news agency Fars quoted sources as saying that no such provision was in the proposed draft.

Meanwhile, ISNA news agency reported that lawmaker Alireza Salimi said a plan to strengthen Iran’s “management rights and sovereignty” over the strait would soon be presented to parliament. It said that it could include imposing administrative fees.

Tehran has insisted that the question of Lebanon should be included in any potential peace process. Amid the ongoing conflict there, Lebanon has accused Israel of pursuing a strategy of widespread destruction and devastation, while Israel has been expanding its military operations against Iran-backed Hezbollah.

Although a formal ceasefire between Israel and Hezbollah began on April 17, it has not held in practice. Both sides have been accusing each other of repeated violations.

Lebanon's health ministry said eight people, including three women, were killed in an Israeli attack on Sunday in the Deir Zahrani region of southern Lebanon.

The UN Security Council will hold an emergency meeting on Monday to discuss the situation after the capture of the strategically important medieval Beaufort fortress, AFP reported, citing diplomatic sources.

Smoke was seen rising from the area around the fort on Sunday and AFP journalists saw an Israeli flag flying over the fort. Israel used the fort as a military base during its previous two-decade occupation.