United States President Donald Trump has cancelled a planned visit to Pakistan by his envoys Steve Witkoff and Jared Kushner, who had been expected to explore indirect talks, which remain deadlocked over issues that include the blockade of the Strait of Hormuz.

“If they want to talk, all they have to do is call!!!” Trump wrote on his social media platform Truth Social on Saturday, signalling that Washington for now would not send negotiators to Pakistan, the country that is mediating between the longtime adversaries.

With neither Washington nor Tehran showing much willingness to soften their positions, prospects for a diplomatic breakthrough in the US-Israeli war on Iran and securing a lasting ceasefire remain stalled.

The conflict spilled into the larger Middle East region, including Lebanon, causing the worst global energy crisis since the 1970s and risking a global recession.

So what do we know about the talks and where they stand as of now?

What has the US said?

The US president on Saturday told reporters in Florida that he scrapped his envoys’ visit because the talks involved too much travel and expense to consider an inadequate offer from the Iranians.

After the diplomatic trip was called off, Iran “offered a lot, but not enough”, Trump said.

On Truth Social, he wrote that there was “tremendous infighting and confusion” within Iran’s leadership.

“Nobody knows who is in charge, including them,” he posted. “Also, we have all the cards, they have none! If they want to talk, all they have to do is call!”

What has Iran said?

In Tehran, Iranian President Masoud Pezeshkian reiterated that his government will not enter negotiations while the US maintains a blockade on Iranian ports.

In a phone call with Pakistani Prime Minister Shehbaz Sharif on Saturday night, Pezeshkian said Washington “should first remove operational obstacles, including the blockade,” before any new talks can begin, according to the ISNA and Tasnim news agencies.

Meanwhile, during his visit to Islamabad on Friday, Iranian Foreign Minister Abbas Araghchi held separate meetings with Pakistan’s army chief, Field Marshal Asim Munir, and Sharif.

In a post on Telegram, Araghchi said their discussions covered regional dynamics and Iran’s non-negotiable positions without disclosing specifics. He added that Tehran intends to engage with Pakistan’s mediation efforts “until a result is achieved”.

After departing Islamabad on Saturday, Araghchi travelled to Oman, where he discussed ways to end the conflict with Sultan Haitham bin Tariq al-Said, according to state media.

He was then scheduled to continue on to Russia. Iran’s IRNA news agency said Araghchi is expected to return to Islamabad on Sunday for additional talks.

What has Pakistan said?

Despite hardening public positions from Washington and Tehran, Pakistan’s political and military leadership is continuing to mediate, two Pakistani officials said on Sunday, according to The Associated Press news agency. They were quoted as describing the indirect ceasefire contacts as still alive but fragile.

There were no immediate plans for US envoys to return for talks, according to the Pakistani officials, who spoke on the condition of anonymity because they were not authorised to speak to the media, AP added.

Al Jazeera’s Kimberly Halkett, reporting from Islamabad, said Pakistani officials are underscoring that the expected return of Araghchi to Islamabad is seen as a “hopeful sign”.

“What they hope is that this will in fact be something that can be incremental in the process and will advance forward,” she reported.

What is happening with the ceasefire?

The US-Iran ceasefire began on April 8 after nearly six weeks of US and Israeli strikes on Iran and retaliatory Iranian attacks against Israel and across the Gulf region.

The two sides held talks in Islamabad on April 11 aimed at securing a permanent deal, but they ended after 21 hours with no breakthrough.

After repeated threats of restarting the war if Iran did not heed Washington’s demands, Trump extended the ceasefire on Tuesday without a set deadline, saying he was in no rush to conclude a peace deal with Iran.

While the truce has held for the most part, the two sides continue to accuse each other of violations.

Iranian forces, which have essentially blocked the Strait of Hormuz, have captured commercial vessels, and the US has intercepted or detained ships suspected of violating its naval blockade of Iranian ports just one week after the ceasefire went into effect.

The naval blockade is seen by Iran as a breach of the ceasefire. Tehran has warned that reopening the Strait of Hormuz is impossible as long as the blockade remains in place.

The critical waterway has become a central dispute in the conflict. One-fifth of the world’s oil and liquefied natural gas supplies were shipped through the strait, which links the Gulf to the Arabian Sea, before the war began.

Iran insists on sovereignty over the waterway, which lies within the territorial waters of Iran and Oman. It has also floated the idea of levying tolls while Washington demands full freedom of navigation. The Gulf nations, which export most of their petroleum through the strait, have opposed the Iranian plan to impose tolls.

Another key issue is the debate over Iran’s stock of enriched uranium.

The US and Israel are pushing for zero uranium enrichment and have accused Iran of working towards building a nuclear weapon while providing no evidence for their claims.

Iran has insisted its enrichment effort is for civilian purposes only. It is a signatory to the 1970 Treaty on the Non-Proliferation of Nuclear Weapons, and Tehran says it has the right to pursue a civilian nuclear programme. But according to the International Atomic Energy Agency, the global nuclear watchdog, Iran has enriched uranium to 60 percent, a level that is far higher than what is needed for civilian use.