President Donald Trump speaks during a dinner in the Rose Garden of the White House. (Photo: AP)Iran has issued a stark warning that it will respond with “painful” force against US bases and interests if Washington and its allies move forward with a new large-scale military strike, with Tehran’s security establishment saying it has received credible information that such an attack is currently being prepared. The warning comes as the monthslong standoff between the US and Iran shows no sign of breaking, even as fresh violence flares across the wider region from the occupied West Bank to the Red Sea and global energy markets remain rattled by the ongoing conflict.Meanwhile, On Sunday, Trump said he was in “deciding mode” over the next phase of the conflict, teasing that “very big things” could unfold soon. He outlined three possible paths forward: a total military defeat of Iran, a sustained economic squeeze to weaken the country, or a negotiated deal to end the war.Story continues below this adKey world developments:Iran’s military vows a harsh response to any new attack, citing unspecified intelligence of preparations underway.An Israeli settler is fatally shot near an illegal West Bank settlement; a Palestinian is killed in a car-ramming incident near Jenin.Parliament Speaker Ghalibaf says Iran must land major military blows before any talks with Washington.Saudi-led coalition intercepts a Houthi ballistic missile aimed at Riyadh, foils other attacks on Saudi cities.US Mission in UAE warns Americans of possible flight cancellations and airspace closures amid rising tensions.Follow the latest world news and major international developments here. This live blog is a rolling curation of the day’s key global stories, with updates added as events unfold and the news agenda changes. The headline, introduction and Top Developments section will be refreshed throughout the day to reflect the stories that matter most at that moment.Live UpdatesSep 21, 2026 05:00 AM ISTUS virtual embassy in Iran issues alert urging citizens to leave countryThe US virtual embassy in Iran has issued a security alert warning all citizens not to travel to Iran “for any reason” and to leave the country.In a statement posted to its website, the embassy said that “Iranian-supported Houthis have engaged in hostilities against Saudi Arabia, including civilian airports. This military conflict has the potential to escalate rapidly”.Sep 21, 2026 04:59 AM ISTTrump says he is in 'deciding mode' over IranIn comments to Fox News Chief Foreign Correspondent Trey Tingst, Trump again said he is in a “deciding mode” and "very big things" are going to happen in the near future regarding the US-Iran war.Trump also added that he will probably be open to meet with Iranian President Masoud Pezeshkian who will go to New York to take part in the UN General Assembly later this week. Regarding the recent escalation by the Houthis in Yemen, Trump stated that the Iran-backed group agreed not to fight the US.BREAKING: President Trump told Fox News Chief Foreign Correspondent @TreyYingst that he is in a “deciding mode” and "very big things" are going to happen in the near future regarding the US-Iran war.Trump said, "My question is, if and when do I blow the entire nation up? They… pic.twitter.com/JcAXh9QN84— Fox News (@FoxNews) September 20, 2026Sep 21, 2026 04:58 AM ISTWelcome to our live blog. We'll be bringing you the latest developments from around the world as they happen stay with us for continuous updates and coverage.Stay updated with the latest - Click here to follow us on Instagram© IE Online Media Services Pvt Ltd