US President Donald Trump announced on social media on Saturday that he had just canceled the trip of US representatives going to Islamabad, Pakistan, to meet with the Iranian side.

Trump's cancellation of the planned visit by special envoy Steve Witkoff and his son-in-law, Jared Kushner, came after the Iranian diplomatic delegation led by Foreign Minister Seyed Abbas Araghchi left Pakistan following a "very fruitful" visit. Araghchi then arrived in Oman.

Although Pakistani mediation remains active and sources said Araghchi could return to Islamabad if ongoing contacts make progress, Saturday's developments suggested that the path toward renewed negotiations remains uncertain, with both sides still far apart on the core conditions for resuming talks.

Trump points to 'infighting,' Iran warns against US miscalculation

Announcing the cancellation, Trump said in a post on Truth Social, "Too much time wasted on traveling, too much work! Besides which, there is tremendous infighting and confusion within their 'leadership.' Nobody knows who is in charge, including them."

Iranian government spokesperson Fatemeh Mohajerani said on Saturday that all political factions within Iran are united in their stance on protecting national security, and that hostile forces should not miscalculate on this matter.

Mohajerani said the Iranian foreign minister's ongoing visits to Pakistan, Oman, and Russia are aimed at strengthening diplomatic coordination and advancing regional peace efforts, according to China Media Group (CMG).

The US president also claimed that "we have all the cards, they have none," adding that "if they want to talk, all they have to do is call."

Earlier on Saturday, Trump told Fox News that he had canceled the trip planned for the second round of negotiations and that it's not worth the US delegation making the 18-hour flight to Pakistan when the US holds all the cards in the conflict with Iran.

Araghchi arrived in Muscat on Saturday for talks with senior Omani officials on bilateral relations and regional developments, Iran's Foreign Ministry said, after concluding talks with Pakistan's leadership.

Araghchi is expected to visit Pakistan again after his trip to Oman, and before traveling to Russia, the semi-official Mehr News Agency said on Saturday, citing a plan announced by Iran's Foreign Ministry.

In Islamabad, Araghchi met with Pakistan's army chief, Asim Munir, and Prime Minister Shehbaz Sharif, according to the semi-official Tasnim News Agency. He discussed Iran's position on ending the war involving the United States and Israel, as well as bilateral ties and broader regional developments.

In a post on X, Araghchi described his visit to Pakistan as "very fruitful" and said Iran appreciated Pakistan's "good offices and brotherly efforts to bring back peace to our region."

He said he had shared Iran's position on a framework for permanently ending the war, adding that they "have yet to see if the US is truly serious about diplomacy."

An Iranian diplomat said on Saturday that Tehran and Washington may hold second-round negotiations in the coming days, according to CMG.

Iran has relayed a message to the US side that urged Trump to tone down threatening rhetoric, and said a softened US stance would make Iran's hardliners more inclined to support diplomatic talks, according to CMG.

A ceasefire between the two sides was reached on April 8. Follow-up talks held in Islamabad on April 11 and 12 failed to produce an agreement.

Iran and the United States had been expected to hold another round of talks in Pakistan this week, but Tehran declined to attend, citing the continued US naval blockade and what it called "excessive" US demands.

US blockade to be 'fully implemented,' Iran says in 'comprehensive' Hormuz plan

US military forces continue to enforce "US sanctions and fully implement the blockade against ships entering or departing Iranian ports," US Central Command said on social media on Saturday.

In a post on X, the US Central Command said that 37 vessels have been redirected since the start of the blockade, noting that a merchant vessel named Sevan, intercepted by the US forces in the Arabian Sea earlier on Saturday, is currently "complying with US military direction to turn back to Iran under escort."

Trump announced on April 12 that the US Navy would begin blocking ships trying to enter or leave the Strait of Hormuz. His decision came after the first round of US-Iranian talks failed to produce a peace deal.

In response to Trump's announcement, Iranian President Masoud Pezeshkian has warned that "any threat against the security of the Strait of Hormuz will have large-scale consequences for global trade."

On Saturday, Iran's main military command, Khatam al-Anbiya Central Headquarters, reiterated its pledge to react if the United States continues its "blockade, banditry and piracy" in the West Asia region.

Iranian parliament member Behnam Saeedi said on Saturday that Iran has developed a "comprehensive plan" for managing the strategic Strait of Hormuz.

Saeedi said in an interview that a key element of the plan involves recognizing only the name "Persian Gulf" in all correspondence and commercial documents, rejecting any other names, according to CMG.

Saeedi further stated that all vessels and ships operating in the region must obtain permission from Iran. He also said that Iran will retain full sovereignty over the Strait of Hormuz.

Israel continues strikes in Lebanon despite ceasefire

Israeli Prime Minister Benjamin Netanyahu has ordered the military to forcefully strike Hezbollah targets in Lebanon, according to a statement issued by his office on Saturday evening.

The Israeli military said in a statement on Saturday afternoon that it had killed more than 15 Hezbollah fighters over the weekend.

In another statement, the Israel Defense Forces said it struck Hezbollah infrastructure used for military purposes across southern Lebanon earlier on Saturday and will continue to operate decisively against threats in accordance with directives from the political echelon.

According to the local news website Lebanon Debate, one person was killed and another wounded in an Israeli air strike on the town of Hadatha in southern Lebanon on Saturday night.

Earlier in the day, Israeli aircraft struck Hadatha twice within less than 10 minutes.

Israeli warplanes also carried out air strikes on the village of Zebqine, the town of Bazourieh, the town of Al Sultaniyah, and the Dabsha area near a waste treatment facility in Khirbet Selm, Lebanese media reported.

The Israeli army also carried out a controlled explosion in the town of Khiam on the same day, while reportedly dismantling solar panels and damaging municipal vehicles in the border town of Debel.

On Saturday evening, Israel's state-owned Kan TV News quoted Israeli security officials as saying that they fear the ceasefire with Lebanon could collapse.

The sources added that Israel demands that the United States put pressure on the Lebanese army to act against Hezbollah in areas north of the Israeli-controlled "security strip" in southern Lebanon, which stretches, according to Israeli statements, from the western coast to the Mount Hermon area and the Syrian border in the east.

Four people were killed on Saturday in two Israeli air strikes targeting a truck and a motorcycle in southern Lebanon's Nabatieh district, the Lebanese Health Ministry said.

The violence came despite a ceasefire between Israel and Lebanon that took effect at midnight between April 16 and 17, following weeks of intensified cross-border fighting linked to the US-Israeli war with Iran.

Trump said on Thursday that the current 10-day ceasefire would be extended by three weeks.

On February 28, Israel and the United States launched joint strikes on Tehran and other Iranian cities, killing Iran's then-Supreme Leader Ali Khamenei, along with senior military commanders and civilians. Iran responded with waves of missile and drone attacks targeting Israel and US bases across the Middle East.

(With input from agencies)