Celebrations and mourning in Iran after Supreme Leader killed

Some Iranians are celebrating news Ayatollah Ali Khamenei has been killed in strikes by the US and Israel.

BBC Persian verified videos of people celebrating in several cities last night.

Footage on the streets of Isfahan in central Iran shows people cheering and honking their car horns in jubilation.

Another video shows people gathering around a bonfire as fireworks lit the night sky. Several families of the killed protesters also celebrated in the streets and at homes.

A report by Reuters news agency says there have also been celebrations in Karaj, a city near Tehran.

But this morning, most of what is happening on streets appears to be pro-government events to mourn the supreme leader's death, BBC Persian reports – although it's still early morning in Iran and that might change later in the day.

In Tehran, images from news agencies show people on the streets mourning, some holding photos of Khamenei.

What happened overnight?

Iran's army has warned of the "most devastating" retaliation after strikes by the US and Israel killed the country's supreme leader, Ayatollah Ali Khamenei. Much has happened in recent hours – if you are just joining us, here's what you need to know.

• Khamenei was killed in his office, Iranian state TV says. The country has declared 40 days of mourning for the hardline cleric who was in charge for the country for 37 years
• The Islamic Revolutionary Guard Corps has warned of a "devastating offensive" in response, saying it would attack US bases and Israel
• According to the constitution, Khamenei's successor must be selected by the same body that chose him: the Assembly of Leadership Experts
• Some Iranians have celebrated while others mourned following the strikes and confirmation of Khamenei's death
• The killing of the supreme leader is a defining moment in the turbulent history of Iran, our chief international correspondent Lyse Doucet writes
• President Donald Trump says Khamenei was "one of the most evil people in history" and that his death marked "the single greatest chance for the Iranian people to take back their country"
• More than 200 people have been killed during the strikes, according to the Red Crescent, and the BBC's media partner, CBS News, has reported around 40 Iranian officials are dead
• Iran has launched attacks throughout the Middle East, on US allies and where the US has military bases, including in Dubai, Doha, Bahrain, and Kuwait
• Four people have been injured following an incident at Dubai International Airport, one of the world's busiest aviation hubs, the country's government says
• The UK is taking part in "co-ordinated regional defensive operations" to protect British people and regional partners, Keir Starmer says

Reza Pahlavi, the exiled son of Iran's last shah (king), external, issued a statement earlier welcoming the death of Ayatollah Ali Khamenei.

In an essay, external for the Washington Post published this evening, Pahlavi expands on his thoughts, first thanking US President Donald Trump for his declaration to the Iranian people that "the hour of your freedom is at hand".

He writes that for almost half a century, the Islamic Republic has been "subverting neighbors’ sovereignty, fueling conflicts around the world, and pursuing nuclear weapons and the long-range missiles to deliver them".

He says the Islamic Republic's most "heinous crimes" were committed at home, including thousands of protesters who were killed during a crackdown on demonstrators in January.

Pahlavi says that the country's path forward should involve a new constitution drafted and ratified by referendum, followed by free elections with "international oversight".

"History rarely announces its turning points in advance. But moments do come when courage, leadership and solidarity can change the course of nations," he writes.