Media playback is unsupported on your device Media captionFootage appears to show missile strike on Ukrainian plane in Iran A Ukraine International Airlines (UIA) flight crashed shortly after taking off from the Iranian capital Tehran on Wednesday, killing all 176 passengers and crew members on board.It came in the midst of escalating tensions between the…

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Media captionPhotos appears to present missile strike on Ukrainian airplane in Iran

A Ukraine Worldwide Airlines (UIA) flight crashed quickly after taking off from the Iranian capital Tehran on Wednesday, killing all 176 passengers and crew members on board.

It came within the guts of escalating tensions between the US and Iran.

After days of denial – and mounting evidence – on Saturday Iran admitted it had shot the Boeing airplane down “unintentionally”.

Right here is what everybody is aware of.

What occurred?

On 8 January, at 06: 12 local time (02: 42 GMT), UIA flight PS752 took off from Imam Khomeini Worldwide Airport.

The airplane used to be a Boeing 737-800 – one of many world airline exchange’s most broadly outdated airplane units.

Prior to it had left the airport’s air condo, the airplane perceived to turn around to come reduction to the runway. Quickly afterwards, it crashed.

The airplane’s “shadowy bins”, which legend flight info and sound all the design thru the cockpit, were recovered from the wreckage.

Nonetheless there have additionally been reviews that bulldozers were sent to the smash internet site sooner than world investigators had arrived, prompting hypothesis that evidence used to be being destroyed.

What induced the smash?

The authorities in Tehran on the beginning acknowledged the UIA airplane suffered a technical subject quickly after desire-off. It cited witnesses including the crew of any other passenger airplane who acknowledged it used to be on hearth sooner than impact.

Authorities acknowledged they lost radar contact when the airplane used to be at an altitude of about 8,000toes (2,400m), minutes after taking off.

No radio hurt name used to be made by the pilot, the document acknowledged.

Nonetheless, the timing of the accident – handsome hours after Iran had launched missiles at US targets in Iraq – provoked hypothesis about varied conceivable causes.

Aviation experts were quick to forged doubt on claims in Iranian tell media that the smash used to be seemingly to had been induced by an engine hearth.

Commercial airplane are designed to be in a subject to resist – usually – a failed engine and to land safely.

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AFP/Getty Photos

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Justin Trudeau acknowledged Canada would now not relaxation till it acquired closure, transparency and justice

On Thursday, Canadian Prime Minister Justin Trudeau acknowledged evidence urged an Iranian missile introduced down the airplane by accident.

“We have intelligence from a pair of sources, including our allies and our comprise intelligence,” Mr Trudeau suggested a news conference in Ottawa. “The evidence indicates that the airplane used to be shot down by an Iranian surface-to-air missile. This will presumably well had been unintended.”

He used to be echoing earlier reviews in US media which acknowledged Pentagon officers were assured that the airplane used to be shot down.

And evidence used to be beginning to support up the missile-shooting thought, now not least after a video acquired by the Recent York Times perceived to present a missile streaking across the night sky after which exploding on contact with a airplane.

Three days after the accident, a assertion by Iran’s armed forces used to be read on tell TV and acknowledged the airplane used to be introduced down “unintentionally”.

Have the Iranians defined all the things?

There is general Iranian act of contrition, but conflicting explanations relating to the true sequence of events.

President Hassan Rouhani described the smash as an “unforgivable mistake”.

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Supreme Leader Ali Khamenei ordered the armed forces to verify “the conceivable shortcomings or errors” that resulted in the smash.

The preliminary Iranian armed forces assertion acknowledged the airplane’s downing used to be on account of “human error” after the airplane had flown shut to a “sensitive internet site” belonging to Iran’s Revolutionary Guards Corps .

The commercial airliner used to be flawed for a “adverse airplane”, the assertion acknowledged.

Hours later, the person guilty for the unit that fired the missile, Revolutionary Guards aerospace commander Brig-Gen Amir Ali Hajizadeh suggested journalists the airplane had been shot down by a temporary-fluctuate missile that exploded next to it.

The Iranian operator had flawed the Boeing for a “cruise missile”. They tried to be in contact with it and waited for 10 seconds for a answer sooner than deciding to delivery hearth, the general acknowledged.

He added that a attach a question to had been made for a no-flee zone within the rep site sooner than the incident but this used to be rejected. The explanations for this remain unclear.

In any case, it appears the Iranian strikes on US bases didn’t impact operations at Imam Khomenei Worldwide Airport on Wednesday morning. Flight PS752 used to be the ninth to desire off after the strikes, in accordance with Flightradar24.

Is this seemingly to whole the controversy?

Iran’s admission of responsibility is an effort at de-escalation, says the BBC’s chief world correspondent Lyse Doucet

Nonetheless a needed question remains.

Gen Hajizadeh suggested the media that he had suggested the authorities about what had occurred on Wednesday – the day of the accident.

So why did it desire three days for Iran to admit it?

The president of Ukraine Worldwide Airlines acknowledged: “We didn’t doubt for a 2nd that our crew and our airplane would per chance presumably now not be the trigger for this corrupt smash”.

Nonetheless the company has denied that the airplane veered from its expected course sooner than the smash. It says officers would per chance presumably peaceful have closed the airport.

Ukrainian President Volodymyr Zelensky called on Iran to punish those guilty. “We question Iran… to raise the guilty to the courts,” he acknowledged.

And Canadian Prime Minister Justin Trudeau acknowledged: “We are in a position to proceed working with our partners around the globe to make obvious a full and thorough investigation.”

What will the investigation be aware fancy?

Under world protocol, the nation the keep the airplane crashes on the whole leads the investigation.

As the airplane used to be made within the US, US officers, including from its National Transportation Safety Board (NTSB), would on the whole desire half in any inquiry.

Iran had on the beginning dominated out handing over any info to the US authorities – in any case, to boot to to the hot tensions, the two international locations haven’t any diplomatic relations.

Nonetheless, Iran’s representative on the UN’s Worldwide Civil Aviation Organization suggested Reuters on Thursday that Iran had formally invited the NTSB to desire half within the investigation, and it has agreed to place an investigator.

Boeing, the airplane’s manufacturer, has acknowledged it is appealing to abet within the investigation and will strengthen the NTSB.

Nonetheless it is unclear what roughly investigation is also implemented now that it is identified the airplane didn’t smash, but used to be introduced down.

Who used to be on board?

The passenger manifest lists 176 folks – 15 of them formative years – giving their names and dates of delivery, but now not their nationalities.

Ukrainian International Minister Vadym Prystaiko has given details that counsel 82 were Iranians, 63 Canadians, 11 Ukrainians including all 9 crew, 10 Swedes, four Afghans, three Britons and three Germans.

Nonetheless, on 10 January, Canada’s International Minister Francois-Philippe Champagne acknowledged the quantity of Canadians on the airplane used to be now believed to be 57.

And the German authorities has acknowledged it has “no info that German citizens are among the victims of the airplane smash in Iran”.

UK Prime Minister Boris Johnson acknowledged on Thursday that four British nationals were on board.

The diversities would per chance presumably well be on account of twin nationalities.

Iran’s head of emergency operations acknowledged 147 of the victims were Iranian. That would counsel that 65 of the foreign nationals had twin nationalities, which Iran does now not recognise.

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