A person has been killed and seven others have been injured after a drone was intercepted at Abu Dhabi’s airport.

The interception led to falling debris at Zayed International Airport, with emergency response teams currently handling the situation.

An “all-out war” seems unlikely after the US-Israeli strikes in Iran, but “destabilisation” in the region is likely, the head of a foreign affairs think tank has said.

Asked on the BBC’s Sunday With Laura Kuenssberg programme for her “best-case scenario” after the killing of Ayatollah Ali Khamenei, Chatham House chief executive Bronwen Maddox said: “Best case is that the protesters begin to come out again on the streets.

“They find that they are not shot down, they begin to produce leaders or a leader, and realise that they can actually change the whole regime.”

Asked for a worst-case scenario, she said: “That the Revolutionary Guard are still… show themselves to be very much in control of the country, that they continue to hit other countries… which not only destabilises the region, but it encourages our country to pull away from the US and pull away from any talks about stabilising Gaza and the West Bank.”

She added: “I don’t think it’s realistic to see an all-out war, because so many countries don’t want it but a destabilisation and the Gulf and Saudi Arabia pulling away from the US – I think that is likely.”

The Israeli military has claimed it has killed 40 senior commanders within one minute of launching air strikes on Iran.

This includes the Iranian supreme leader, as well as seven senior leaders which includes Abdolrahim Mousavi, who served as chief of staff of the armed forces.

“During the operation, we destroyed approximately half of the Iranian regime’s missile stockpiles and prevented the production of at least 1,500 additional missiles,” a military spokesman said.

“The regime had recently been producing dozens of surface-to-surface missiles per month and intended to increase production to hundreds per month.”

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.

“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,” Putin said in a note to Iranian counterpart Masoud Pezeshkian.

Green Party leader Zack Polanski has condemned the attacks in Iran, branding them “illegal and unprovoked”.

He told the BBC’s Sunday With Laura Kuenssberg programme: “We’ve seen what I would say is an illegal and unprovoked attack.

“We’ve got a Defence Secretary saying that diplomacy is the long runway we need but won’t condemn Donald Trump when he attacks a country and assassinates its leader.

“That’s the law of the jungle. That’s an end to international law.

“It’s quite astounding that we have a Prime Minister that seems singularly incapable of standing up to Donald Trump and letting the UK stand on its own two feet, and I’m worried the UK is going to be pulled into another illegal war.”

Priti Patel has questioned why the Prime Minister was not more “proactive” in the run-up to the US and Israeli strikes on Iran.

She said: “A lot of this has been about why has Keir Starmer not actually worked with our American allies to be much more proactive?

“On the basis that a lot of intelligence is shared between our two countries, the Americans would easily have shared – and rightly so – details of their plans.

“Why were some of our bases not used? And was the British Government asked about use of our military bases in the defensive strikes that took place?”

Tory shadow foreign secretary has said that the UD/ Israeli attacks on Iran were legitimate because Iran “posed a threat” and they do not have to sit and wait to be attacked first.

But she has hit out at Keir Starmer’s government for not taking action against Iranian proxies in the UK.

This follows the prime minister admitting that in the last year Iran has sponsored 20 terror plots in the UK.

Dame Priti said: “The Iranian ambassador should be expelled immediately.”

The defence secretary has repeatedly declined to say whether the UK believes the US-Israeli strikes on Iran were legal.

Asked six times by the BBC’s Laura Kuenssberg whether the UK backed the strikes or thought they were legal, John Healey declined to give a direct answer.

He said: “Britain played no part in the strikes on Iran.

“We share, however, the primary aim of all allies in the region and the US that Iran should never have a nuclear weapon.”

He later added: “It is for the US to set out the legal basis of the action that it took.”

Earlier, he had been asked the same question twice by Sky News’s Trevor Phillips and given a similar response.

KLM has cancelled or adjusted flights across the Middle East because of the conflict that erupted in the region over the weekend, avoiding the airspace of Iran, Iraq, Israel and parts of the Gulf, it said on Saturday evening.

The Dutch arm of Air France-KLM said that flights to and from Dubai, Dammam and Riyadh due to take off over the weekend have been cancelled. KLM had already brought forward suspension of its Amsterdam-Tel Aviv service to 28 February after strikes hit Iran.

The carrier said it is monitoring developments closely and will update its schedule as needed and that passengers on affected flights will be rebooked once operations resume.