Iran’s Islamic Revolutionary Guard Corps has announced that the Strait of Hormuz is closed and any transit through the waterway will face “harsh measures”, according to state media.
It added that shipping “to and from ports of allies and supporters of the Israeli-American enemies” is prohibited through any corridor or to any destination.
Three container ships of mixed nationalities were forced to turn back after warnings.
The passage, through which one fifth of the world’s oil and gas passes, has remained largely closed since the outbreak of hostilities.
It comes as Donald Trump is considering sending another 10,000 troops to the Middle East, according to a Wall Street Journal report.
The forces would likely be sent within striking distance of Iran and Kharg Island, a key oil export hub off in the Persian Gulf.
Despite the escalation, Germany’s foreign minister on Friday said the US and Iran have had indirect negotiations and that representatives plan to meet shortly in Pakistan.
Trump said he would again extend the deadline for Iran to reopen the Strait of Hormuz or face the destruction of its energy plants, after Tehran had earlier rejected a 15-point US proposal to end the fighting as unfair.
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Mother of child killed in Minab strike blames US at UN emergency meeting
The mother of two children killed on a strike in Minab, Iran on the first day of the war has blamed the US and Israel for being “the cause of this suffering” and called on the countries to be held to account, during a UN Human Rights Council debate on Friday.
“I call upon the Human Rights Council, its members, upon the responsible institutions, and upon all those who have a duty and ability to defend the lives of children, not to let this tragedy be forgotten,” the mother said via a video message.
She added: “No mother is prepared to hear the words 'your child isn't coming back'.”
UN rights chief urges US to conclude probe into deadly Iran school strike
The UN rights chief has urged Washington to conclude its investigation into a fatal strike on a primary school in Iran.
The statements came at an emergency debate at the Geneva council at a UN Human Rights Council meeting on Friday to discuss the attack on the Shajareh Tayyebeh School, which killed more than 175 children and teachers on the first day of the war, according to authorities.
US military investigators have reportedly been looking into the attacks, but a report has not yet been released.
UN Human Rights chief Volker Turk called for Washington to conclude its probe as soon as possible and publish the results.
"There must be justice for the terrible harm done," he said by video link after meetings with US officials in Washington this week.

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Three drones intercepted and destroyed in Riyadh, says Saudi defence ministry
Saudi Arabia’s defence ministry has said that three drones were intercepted and destroyed in its capital of Riyadh, in a statement on Friday.
Sirens were heard this morning amid reports of drone attacks. The defence ministry said that debris fell in the vicinity of the military site but no injuries were reported.
Strikes on Iran to escalate and expand, says Israeli defence minister
Israel Katz, Israel’s defence minister, has warned that Iran will pay “heavy and increasing prices” for reportedly targeting Israeli civilians.
He promised that strikes on Tehran would escalate and expand to additional “targets and domains” that assist Iran in building and operating weapons against Israeli civilians.
More than 1,900 people killed in Iran, says Red Crescent
The Iranian Red Crescent has reported that more than 1,900 people have been killed since the war against Iran broke out on 28 February.
At least 20,000 people have been injured, it added in a statement on Friday.
UN calls for Lebanon's 'territorial integrity' to be respected
A United Nations official has said on Friday that Lebanon’s territorial integrity must be respected as the conflict in the Middle East intensifies.
“What we really need is for Lebanon’s territorial integrity, Lebanon’s sovereignty to be fully respected,” a representative said.
“We have seen increasingly worrying rhetoric concerning activities in southern Lebanon by the Israeli army and authorities”.

Iran closes Strait of Hormuz, says state media
Iran’s Islamic Revolutionary Guard Corps has announced that the Strait of Hormuz is closed and any transit through the waterway will face “harsh measures”, according to state media.
It added that shipping “to and from ports of allies and supporters of the Israeli-American enemies” is prohibited through any corridor or to any destination.
Three container ships of mixed nationalities were forced to turn back after warnings.
The passage, through which one fifth of the world’s oil and gas passes, has remained largely closed since hostilities broke out.
'Iran is talking': Trump, claims 'defeated' regime facing internal 'disaster'
Saudia Arabia's Crown Prince urges Trump to intensify attacks against Iran in 'historic opportunity' to remake the Middle East, says Saudi intelligence official
Crown Prince Mohammed bin Salman has urged President Donald Trump to not only continue his attacks on Iran but to intensify them, calling the campaign a “historic” opportunity to remake the Middle East, a Saudi intelligence source confirmed to The New York Times.
Trump told reporters on Tuesday that the prince was “a warrior.”
“He’s fighting with us,” he said.

