Článek
Iran has responded by launching attacks on Israel and US-allied states in the Gulf.
The fighting escalated quickly, spreading to Lebanon, with casualties and damage mounting on all sides.
Trump at a crossroads as US weighs tough options in Iran
What has been happening in Iran?
When the US and Israel first attacked, they targeted Iran's missile infrastructure, military sites and leadership in the capital, Tehran, and across the country.
Iran's Supreme Leader, Ayatollah Ali Khamenei, who had led the country since 1989, was killed during the first wave of strikes. Israel's military say dozens more senior figures in the powerful Islamic Revolutionary Guard Corps (IRGC) were also killed.
Khamenei's son, Mojtaba Khamenei, was named as his successor on 8 March.
Other high-ranking Iranian officials killed include security chief Ali Larijani, intelligence minister Esmail Khatib and the head of the paramilitary Basij force, Gholamreza Soleimani. Israel says it targeted them in air strikes.
Who is Mojtaba Khamenei, Iran's new supreme leader?
The US and Israel have also targeted key sites linked to Iran's nuclear programme - which Iran insists is entirely peaceful - and Iranian oil and gas sites.
They include Kharg Island, home to a major oil terminal that is considered Iran's economic lifeline.
Israel also targeted South Pars, part of the world's largest natural gas field.
The US-based group Human Rights Activists in Iran (HRANA) reported on 29 March that 3,486 people had been killed in Iran since the war began – including 1,568 civilians, of whom at least 236 were children.
Iran accused the US and Israel of launching an attack on a girls' school near an IRGC base in southern Iran on 28 February, saying 168 people, including around 110 children, were killed.
The US said it was investigating the incident, while Israel said it was „not aware“ of any military operations in the area.
Expert video analysis shows a US Tomahawk missile hit a military base near the school, BBC Verify has reported.
Access to Iran for international journalists is limited, and internet connectivity in the country has been almost entirely restricted.
Outside its territory, an Iranian warship was sunk by a US submarine in the Indian Ocean near Sri Lanka on 4 March. At least 87 people were killed.
Questions mount for Hegseth over possible US involvement in strike on Iranian school
'What if we're left with ruins?': Doubts creep in for Iranians who supported war
Where has Iran attacked?
Iran has described the US and Israeli strikes as „unprovoked, illegal and illegitimate“, and has carried out widespread missile and drone attacks in response.
The IRGC said it had targeted Israeli government and military sites in Tel Aviv and elsewhere.
As of 29 March, Israel's Magen David Adom ambulance service (MDA) said 19 people had been killed by missile fire since the start of the war.
There have also been strikes in countries hosting US bases – Qatar, Bahrain, Jordan, the United Arab Emirates (UAE) and Kuwait – and US-allied Oman and Saudi Arabia.
Thirteen US service members have been killed.
Iran has also been accused of attacking oil and gas facilities, shipping and civilian sites.
At least 24 people have been killed across the Gulf so far, most of them security personnel or foreign workers.
That includes 11 people in the UAE and seven in Kuwait, while Oman, Saudi Arabia and Bahrain have each reported two deaths.
In northern Iraq, a French soldier was killed by a drone at a Kurdish military base.
On 25 March, seven Iraqi soldiers were killed in an airstrike in Anbar province, in the west of the country, according to a statement from the Iraqi Ministry of Defence. The statement did not say who had carried out the attack.
Also in Iraq, the Popular Mobilization Forces (PMF) - formed in the last decade to fight the Islamic State group - said at least 27 of their members have been killed.
In the Israeli-occupied West Bank, four Palestinian women were killed at a beauty salon in an Iranian missile attack.
Turkey said Nato air defences had shot down three Iranian missiles over its airspace. Azerbaijan accused Iran of attacking an airport with drones.
The US and its Arab allies have condemned Iran's attacks, saying „the targeting of civilians and of countries not engaged in hostilities is reckless“.
On 14 March, the Palestinian armed group Hamas in Gaza urged Iran to stop attacking Gulf states, in a rare appeal to its key ally.
On 7 March, Iranian President Masoud Pezeshkian apologised to neighbouring countries that were attacked and said „from now on“ the military should not attack neighbouring countries „unless attacked first“. But since then, attacks have continued.
Elsewhere, a British military base in Cyprus was struck by a drone, according to the UK Ministry of Defence. Western officials later said the drone had not been launched from Iran.
