Key events5m agoIRGC warns renewed war could extend beyond Middle East38m agoOpening summary: US and Iran trade threatsShow key events onlyPlease turn on JavaScript to use this featureIRGC warns renewed war could extend beyond Middle EastIran’s Islamic Revolutionary Guard Corps (IRGC) has threatened to extend a renewed war beyond the Middle East if the US resumes attacks against Tehran.The warning came after Donald Trump threatened to strike Iran again if it did not accept a deal to end the conflict.In a statement carried by the semi-official Tasnim news agency in Iran, the IRGC said: “Should aggression against Iran be repeated, the regional war that was promised will this time extend beyond the region, and our crushing blows in places you can scarcely imagine will reduce you to ashes.”A South Korean oil tanker is passing through the strait of Hormuz, marking the first such case involving a Korea-managed ship since the Iran war began.“Consultations with Iranian authorities were completed, and the vessel began sailing yesterday. It is passing through the strait very cautiously,” South Korea’s foreign minister, Cho Hyun, said, according to the Seoul-based Yonhap news agency.He added that the vessel was carrying 2m barrels of crude oil.Yonhap reported that the tanker began sailing in waters near Qatar yesterday after receiving passage approval from Iran a day earlier. Citing officials, the news agency said no transit fees were paid to Iran for the safe transit of the vessel.The passage came nearly two weeks after the South Korean-operated HMM Namu was struck by “two unidentified aircraft” in the strait, causing a fire and leaving one of the vessel’s 24 crew members with minor injuries.The Panama-flagged cargo vessel, operated by South Korean shipping firm HMM Co, arrived in Dubai after the incident for investigation.Iran has denied responsibility, with its embassy in Seoul saying it “firmly rejects and categorically denies any allegations regarding the involvement” of its forces. Seoul strongly condemned the attack and said it hoped to identify those behind it through an investigation.Opening summary: US and Iran trade threatsWelcome to our live coverage of events in the Middle East.Donald Trump warned the US may strike Iran again – a day after he said he had held off a major assault in hopes of a peace deal – but Tehran’s army threatened to open “new fronts” if he went ahead.Trump told reporters at the White House that he had been just “an hour away” from relaunching Washington’s attacks on Iran before postponing the order, after weeks of a fragile ceasefire and talks to end the war, which began on 28 February.The decision apparently followed a further peace proposal submitted by Tehran via Pakistan, which has mediated, and may have been motivated by the reluctance of allies, including Saudi Arabia, Qatar and the United Arab Emirates, to see hostilities resume.A woman walks near a billboard with an image of the late Iranian supreme leader Ayatollah Ali Khamenei, in Tehran, Iran. Photograph: Majid Asgaripour/Reuters“You know how it is to negotiate with a country where you’re beating them badly. They come to the table, they’re begging to make a deal,” Trump said. “I hope we don’t have to do the war, but we may have to give them another big hit. I’m not sure yet.”Oil prices eased on the apparent positive signals from the White House, with Brent crude falling to $110 a barrel, before regaining much of its losses.In response to Trump, Iran’s army spokesperson Mohammad Akraminia warned the Islamic republic would “open new fronts against” the US if it resumed its attacks.He added that Iran’s military had used the ceasefire as an opportunity “to strengthen its combat capabilities”.Here are the other main developments: