Key members of the OPEC+ oil cartel announced a greater-than-expected increase to production quotas on Sunday following US and Israeli strikes on Iran that triggered retaliation by Tehran across the Middle East.

The eight-strong V8 (Voluntary Eight) group in the alliance, which includes top oil producers Saudi Arabia and Russia -- as well as several Gulf states bearing the brunt of Tehran's missile strikes -- said they had agreed a "production adjustment" of 206,000 barrels per day (bpd).

"This adjustment will be implemented in April," they said in a statement.

BRUSSELS, March 1 (Reuters) - European Union foreign policy chief Kaja Kallas said on Sunday that the death of Iran's Supreme Leader Ayatollah Ali Khamenei was "a defining moment in Iran’s history".

"What comes next is uncertain. But there is now an open path to a different Iran, one that its people may have greater freedom to shape," Kallas said on social media platform X.

"I’m in contact with partners, including those in the region that bear the brunt of Iran’s military actions, to find practical steps for de-escalation."

SEOUL, March 1 (Reuters) - North Korea's foreign ministry spokesperson said in a statement that Israel's attacks on Iran and the U.S. military operation were "illegal aggression" and a violation of national sovereignty, state media Korean Central News Agency reported on Sunday.

The U.S. military operation against Iran was "within the range of expectations," the spokesperson said, calling it an inevitable outcome given the "hegemonic and gangster-like" nature of the United States.

By Parisa Hafezi

DUBAI, March 1 (Reuters) - Some Iranians grieved while others celebrated the death of Supreme Leader Ayatollah Ali Khamenei, exposing a deep fault line in a country stunned by the sudden demise of the man who ruled for 36 years.

Iranian state TV announced his death in the early hours of Sunday, the voice of the broadcaster breaking with emotion as he confirmed Khamenei had been killed in the U.S.-Israeli attack on Saturday. Footage from Tehran showed mourners packed into a square, dressed in black and many of them weeping.

LONDON, March 1 (Reuters) - Iran's Supreme Leader Ayatollah Ali Khamenei was killed in U.S. and Israeli strikes, state media confirmed as another wave of attacks hit the country on Sunday.

Below is international reaction to his death.

RUSSIAN PRESIDENT VLADIMIR PUTIN

"Please accept my deep condolences in connection with the murder of the Supreme Leader of the Islamic Republic of Iran, Seyed Ali Khamenei, and members of his family, committed in cynical violation of all norms of human morality and international law."

SWEDISH FOREIGN MINISTER MARIA STENERGARD

The EU warned Sunday against a prolonged war in the Middle East, saying further escalation could threaten Europe and beyond, as it urged Iran to refrain from indiscriminate retaliation after US-Israeli strikes.

Foreign ministers from the bloc's 27 nations -- most of which are NATO members -- held extraordinary talks via video link on day two of an assault that killed Iran's supreme leader, as EU chief Ursula von der Leyen called for a "credible transition" in the country.

LONDON, March 1 (Reuters) - Britain's Defence Secretary John Healey on Sunday declined to explicitly back strikes by the United States and Israel on Iran, saying it was for the U.S. to "set out the legal basis of the action it took".

Iran's Supreme Leader Ayatollah Ali Khamenei was killed in the air strikes on Saturday, Iran's state media has confirmed.

Healey told the BBC's Laura Kuenssberg that Britain played no part in the strikes, but it did share the aim of the United States and other allies in the region that Iran should never have a nuclear weapon.

MOSCOW, March 1 (Reuters) - Russian President Vladimir Putin said on Sunday that the killing of Iranian Supreme Leader Ayatollah Ali Khamenei and members of his family was "cynical" murder that violated all the norms of human morality and international law.

By Federico Maccioni, Joe Brock and Tim Hepher

DUBAI, March 1 (Reuters) - Global air travel remained heavily disrupted on Sunday as continued air strikes kept major Middle Eastern airports, including Dubai, the world's busiest international hub, closed in one of the sharpest aviation shocks in recent years.

Key transit airports, including Dubai and Abu Dhabi in the UAE and Doha in Qatar, were shut or severely restricted as much of the region’s airspace remained closed after U.S. and Israeli strikes killed Iranian Supreme Leader Ayatollah Ali Khamenei on Saturday.

KARACHI, Pakistan/BAGHDAD, March 1 (Reuters) - At least nine protesters were killed when crowds breached the outer wall of the U.S. consulate in the Pakistani city of Karachi, following news of U.S. and Israeli strikes on Iran that killed Supreme Leader Ayatollah Ali Khamenei.

Iraqi police fired tear gas and stun grenades to scatter hundreds of pro-Iranian protesters also gathered outside the Green Zone in the capital Baghdad, where the U.S. Embassy is located.

"Death to Israel, death to America," the protesters shouted.