Welcome to the Guardian’s continuing coverage of the crisis in the Middle East.

The fragile ceasefire between the US and Iran showed further strain on Friday, a day before delegations from both countries are due to meet in Pakistan, as Donald Trump accused Tehran of breaching promises on the strait of Hormuz and Israel struck Lebanon with attacks that Iran claims violate the truce.

Trump said in a social media post late Thursday that Iran was doing a “very poor job” of allowing oil to go through the strait. “That is not the agreement we have!“

There is no sign Iran is lifting its near-total blockade of the strait, which has caused the worst-ever disruption to global energy supplies. Tehran cited Israel’s ongoing attacks on Lebanon, which included the heaviest strikes of the war on Wednesday, as a key sticking point.

In the first 24 hours of the ceasefire, which Trump announced on Tuesday, just a single oil products tanker and five dry bulk carriers sailed through the strait, which typically carries a fifth of the world’s oil and liquefied natural gas flows and 140 ships a day before the war.

• Donald Trump has said he is “very optimistic” a peace deal with Iran was within reach as a diplomatic delegation led by his vice-president JD Vance prepared to head to Pakistan for high-stakes talks aimed at ending the war this weekend. Iran’s leaders “talk much differently when you’re at a meeting than they do to the press. They’re much more reasonable,” the US president said, in line with his administration’s narrative that there’s a disconnect between what Tehran says publicly and privately.

• Trump also confirmed that he had asked Benjamin Netanyahu on Wednesday to be “more low-key” in Lebanon to help ensure the success of the upcoming US-Iran negotiations in Islamabad. “I spoke with Bibi and he’s going to low-key it. I just think we have to be sort of a little more low-key,” Trump told NBC News, adding that he believed Israel was “scaling back” its operations in Lebanon.

• Netanyahu said he had instructed his cabinet to begin direct negotiations with Lebanon aimed at disarming Hezbollah – all the while insisting that “there is no ceasefire” in Lebanon and that Israel will “continue to strike Hezbollah with force”.

• Israel has since launched a fresh wave of strikes against what it called “Hezbollah launch sites” in Lebanon, after the IDF earlier ordered people to flee Beirut’s densely populated southern suburbs. Later in the day, Hezbollah said it had fired a rocket salvo towards northern Israeli settlements.

• While Israel continues to insist that the war will go on and “talks will be held under fire”, Lebanon is demanding a ceasefire before direct negotiations can begin. Joseph Aoun, the Lebanese president, said this was “the only solution”. Lebanon is also insisting that it needs the US as a mediator and guarantor of any agreement. Those talks will take place next week, hosted by the US state department in Washington.

• Iran’s ⁠president ⁠Masoud Pezeshkian said ⁠Israeli strikes on ⁠Lebanon violate the ceasefire agreement and would render ‌negotiations meaningless, adding that Iran would not abandon the Lebanese people.

• The speaker of the Iranian parliament, Mohammad Bagher Ghalibaf, said Lebanon forms “an inseparable part of the ceasefire” deal. In a post on X, he said “there is no room for denial and backtracking”.

• Keir Starmer also said that Israel’s continued attacks on Lebanon “shouldn’t be happening”. The British prime minister also dismissed an argument put forward by US vice-president JD Vance on Wednesday that there had been “a legitimate misunderstanding”, saying the issue “isn’t a technical one of whether it’s a breach of the agreement or not”. It is “a matter of principles as far as I’m concerned”, Starmer said.

• A statement attributed to Mojtaba Khamenei, Iran’s supreme leader, said Iran will take management of the strait of Hormuz into a new phase, but did not elaborate on what that would be. In the statement, read out on state tv, he also said Iran remains determined to “take revenge” for his father, who was assassinated on the first day of the war, and all those killed in the war. “We will certainly demand compensation for each and every damage inflicted, and the blood price of the martyrs and the compensation for the wounded of this war,” he said.