The Iran–US–Israel war widened sharply in the past 24 hours as Iranian forces continued to strike Israeli and US targets across the Middle East, and Israel launched intense air bombardments on Lebanon following retaliatory rocket and drone fire from Hezbollah, raising alarms over a full-scale regional conflagration and mounting civilian casualties.
Monday, the conflict -- already in its third day following the joint US-Israeli attacks that killed Iran’s Supreme Leader Ayatollah Ali Khamenei and senior commanders -- spilled into Lebanon, where Israeli airstrikes on Beirut and southern regions killed at least 31 people and injured 149, according to the Lebanese Health Ministry.
The strikes were in direct response to Hezbollah missile and drone barrages toward northern Israel, which Tehran and its allies say are acts of solidarity and legitimate defense after the weekend’s illegal aggression against Iran.
The rapid escalation has deeply unsettled populations across the region, as Tehran vows continued retaliation and accuses Washington and Tel Aviv of waging a campaign of collective punishment against Iranian civilians.
Monday’s violence marked the first major expansion of hostilities beyond direct Iran–Israel clashes.
Hezbollah, the Lebanese militia allied with Tehran, launched rockets and drones toward Israeli territory in retaliation for Khamenei’s killing -- a watershed moment observers see as a potential turning point in the war.
In response, Israel unleashed airstrikes on Beirut and southern Lebanon, warning of prolonged operations.
Lebanon’s Prime Minister Nawaf Salam condemned Hezbollah’s use of Lebanese territory to attack Israel, calling the actions “irresponsible” and justifying, in his view, Israel’s bombardment.
Yet residents in Beirut told local media they have been trapped in bombardment zones with little warning, raising fears over civilian harm.
Iranian allies and analysts have framed Hezbollah’s actions as part of a broader imperative to confront what they view as Western-backed aggression.
“This is not simply a skirmish,” said a Tehran-based security analyst.
“This is a collective response to a campaign that began with an unlawful assassination of a sovereign nation’s leader and now threatens the stability of the entire region.”
Inside Iran, the toll from US and Israeli airstrikes has soared.
The Iranian Red Crescent Society reported at least 555 deaths across 131 cities since Saturday’s offensive, which targeted military infrastructure but also hit civilian districts. Hospitals in major cities continue to treat large numbers of wounded, with rescue teams working amid rubble.
Security Chief Ali Larijani has categorically rejected reports in some US media that he had been seeking to resume nuclear talks with Washington prior to the outbreak of war, calling such claims “fabrications intended to justify aggression.”
“Iran’s people and leadership have sought peace, not violence,” Larijani said.
“But we will defend our nation and our people against unlawful force.”
Iran’s leadership also points to recent diplomatic efforts -- including negotiations mediated by Oman in Geneva -- that had been aimed at de-escalation, only to be overtaken by military actions that Tehran calls “premature and provocative.”
Beyond Lebanon and Iran, the conflict has triggered attacks and security incidents across the Gulf.
Iranian missile and drone strikes have targeted US military positions and allied Gulf states, drawing unified condemnations from Washington and Gulf capitals, who characterized Tehran’s actions as “indiscriminate and reckless” and a threat to regional stability from Bahrain to the UAE.
A significant incident occurred in Kuwait, where the Defense Ministry reported that “several” US warplanes crashed.
US Central Command later clarified that Kuwait’s air defense had mistakenly shot down three F-15 fighter jets engaged in Iran-related operations; all six crewmen ejected and were recovered in stable condition.
In the Gulf of Oman, an oil tanker was struck in an attack that killed one crew member, while separate drone strikes have been reported at energy facilities in Qatar and Saudi Arabia.
Saudi authorities confirmed a fire at the kingdom’s largest refinery following drone hits, forcing operational suspension.
In Cyprus, two drones heading for a UK base were intercepted, reflecting the widening geographical scope of hostilities.
In Washington, President Donald Trump reiterated that military operations against Iran will continue “until all objectives are achieved,” and pledged retaliation for the deaths of three US soldiers reportedly killed in earlier exchanges.
Trump’s stance underscores the US administration’s framing of the conflict as necessary to counter what it calls Iranian threats.
A joint communiqué from the United States and Gulf state partners condemned Iran’s missile and drone strikes across multiple countries, including Bahrain, Iraq (including the Kurdistan Region), Jordan, Kuwait, Oman, Qatar, Saudi Arabia and the UAE, alleging that Tehran’s actions jeopardize regional security and trade.
Amid the militarization, international agencies have sounded alarms.
Rafael Grossi, Director General of the International Atomic Energy Agency, warned that attacks on civil nuclear infrastructure could force mass evacuations due to potential radiological release.
He noted, however, that there is currently no indication that any of Iran’s nuclear facilities have been struck in recent US and Israeli assaults.
Grossi’s comments underscore the broader humanitarian risks as the war disrupts civilian life and threatens critical infrastructure across the Middle East.
Reactions to the widening war are mixed.
Some Gulf governments have tightened diplomatic pressure on Tehran, summoning envoys and condemning strikes on their territory, while others call for de-escalation and dialogue.
Regional powers fear that continued hostilities could fracture long-standing political and economic ties.
Public sentiment in many Arab capitals has reflected deep unease over the violence.
Demonstrators in several cities have protested the escalation, decrying what they view as external interference that has made their homelands battlegrounds.
UN officials have urged all parties to cease hostilities and return to diplomatic channels, recognizing the risk of a broader catastrophe if the war engulfs additional states.
