Cheers and mourning in Iran. Euphoric celebrations against the Iranian regime and angry protests against the war. Uncertainty about what comes next.

The world greeted with jubilation, anger or trepidation the news Sunday that Iran's supreme leader Ayatollah Ali Khamenei had been killed in the US-Israeli strikes on the Islamic republic one day earlier.

- Music in Tehran -

Iranians took to the streets cheering with joy, setting off fireworks and playing celebratory music after reports of Khamenei's death, according to witnesses and video footage verified by AFP.

By Maha El Dahan and Andrew Mills

DUBAI, March 1 (Reuters) - Loud blasts were heard in Dubai and the Qatari capital Doha for the second day on Sunday, witnesses said, as Iran's retaliatory strikes on neighbouring Gulf states in response to U.S. and Israeli strikes on the Islamic Republic widened.

Iran had said it would target U.S. bases in the region but it has hit a range of other targets across Gulf cities.

Two people were injured in Dubai after shrapnel from drones fell over two houses when they were intercepted, aDubai Media office statement said.

March 1 (Reuters) - The United States will hit Iran "with a force that has never been seen before," U.S. President Donald Trump said on Sunday, should the Middle East nation retaliate for U.S. strikes.

"Iran just stated that they are going to hit very hard today, harder than they have ever been hit before," Trump said in a post on Truth Social.

He added, "THEY BETTER NOT DO THAT, HOWEVER, BECAUSE IF THEY DO, WE WILL HIT THEM WITH A FORCE THAT HAS NEVER BEEN SEEN BEFORE!"

(Reporting by Rishabh Jaiswal in Bengaluru; Editing by Clarence Fernandez)

DUBAI/JERUSALEM/WASHINGTON, March 1 - Israel said it had launched another wave of strikes on Iran on Sunday, as Iranians faced uncertainty after the killing of their supreme leader in U.S. and Israeli attacks that threatened to destabilize the wider Middle East.

Hours after the United States and Israel said that an air strike killed Ayatollah Ali Khamenei as part of the most ambitious series of attacks on Iran in decades, Iranian state media confirmed the 86-year-old leader's death on Saturday.

As a fresh Middle East conflict risks sending oil prices sharply higher, Saudi Arabia, Russia and six other key members of the OPEC+ alliance are widely expected to announce an output increase Sunday, analysts say.

The virtual meeting by the eight members of the Organization of the Petroleum Exporting Countries and allied nations (OPEC+) known as the "Voluntary Eight" (V8) comes a day after the US and Israel launched an ongoing wave of strikes on Iran.

By Parisa Hafezi

WASHINGTON, Feb. 28 (Reuters) - The 36-year rule of Ayatollah Ali Khamenei built Iran into a powerful anti-U.S. force, spreading its military sway across the Middle East, while using an iron fist to crush repeated unrest at home.

He was killed on Saturday, aged 86, Iranian state media announced, in air strikes by Israel and the U.S. that pulverised his central Tehran compound, after decades of efforts to resolve the dispute over Iran's nuclear program diplomatically failed.

By David Brunnstrom

WASHINGTON, Feb 28 (Reuters) - The United States and Israel launched their most ambitious attacks on Iran in decades on Saturday in an operation that killed Supreme Leader Ayatollah Ali Khamenei.

KABUL, March 1 (Reuters) - Blasts and gunfire were heard in Kabul on Sunday, a Reuters journalist in the Afghan capital said, as fighting between Afghanistan and Pakistan entered a fourth day.

Explosions echoed across parts of the city before sunrise, followed by bursts of gunfire, the journalist said.

It was not immediately clear what had been targeted or whether there were casualties.

Taliban administration spokesperson Zabihullah Mujahid said the sounds were the result of Afghan forces targeting Pakistani aircraft over the capital.

WASHINGTON, Feb 28 (Reuters) - The United States unleashed an array of weaponry against Iranian targets on Saturday, including Tomahawk cruise missiles, stealth fighters, and for the first time in combat, low-cost one-way attack drones modeled after Iranian designs.

U.S. Central Command released photographs showing Tomahawk missiles, F-18 and F-35 fighter jets alongside details of the strikes on Iran as part of Operation Epic Fury.

DRONES

March 1 (Reuters) - Iran's Supreme Leader Ayatollah Ali Khamenei has been killed in Israeli and US strikes, Iranian state media said on Sunday.

(Reporting by Yomna Ehab and Hatem Maher)