Hassan Rouhani

A, Ukraine International Airlines (UIA) crashed flight shortly After take-off from the Iranian capital city of Tehran on 8. January, killing all 176 passengers and crew members on Board.

It came in the midst of escalating tensions between the US and Iran .

After days of Denial and mounting instructions - on Saturday, Iran it has had, admittedly, shot the Boeing plane down "unintentionally".

Here is what we know.

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

The aircraft was a Boeing 737-800 - One of The International airline industry's most widely used aircraft models.

Previously it had The Airport , left the air space, the plane appeared to turn back to The Runway . Shortly After , it crashed.

The plane's "black boxes" recording flight data and the sound in The Cockpit , salvaged from the wreck.

But there are also reports that the mechanical excavator were at the Crash Site before international investigators arrived, prompting speculation that Evidence will be destroyed.

said The government in Tehran initially, the UIA aircraft suffered a technical problem shortly After take-off. He quoted witnesses, including The Crew of another passenger plane, said it was On Fire before impact.

The Authorities said they lost radar contact when the aircraft was at an altitude of about 8,000 ft (2,400 m), minutes After Taking Off .

No radio distress call was from The Pilot , The Report said.

However, the timing of The Accident - just hours After Iran has rockets on US targets in Iraq , Provoked speculation about possible reasons.

aviation experts were quick to doubt claims in Iranian state media that The Crash was likely caused by an engine fire.

Commercial aircraft to land designed to be able to reflect - in General - a failed engine and safe to use.

On Thursday, the Prime Minister of Canada Justin Trudeau , The Evidence suggested an Iranian missile down, brought the plane By Accident .

"We have intelligence from multiple sources, including our allies and Our Own intelligence," Mr. Trudeau said at a press conference in Ottawa. "This suggests that the plane was shot down by an Iranian ground-to-air missile. This can also unintentionally. "

He echoed previous reports in US media, said Pentagon officials were confident that the plane was shot down.

And The Evidence was returned to the beginning, to the rocket, the theory of shooting.

Video on Social Media showed a missile streaking across The Night sky and explode close to the plane. (The New York Times later published a video that the orientation of the airliner. It is believed that the original strike disabled the plane's transponder before the second strike, about 23 seconds later. )

Three Days After The Accident , a statement by Iran 's military was read on state television and said that the plane was brought down "unintentionally".

It is common Iranian is an admission of guilt, but contradictory statements about the exact sequence of events.

President Hassan Rouhani described The Accident as a "unforgivable mistake".

the Supreme leader Ali Khamenei ordered the military to investigate "the possible shortcomings, or errors" led to crash.

The first Iranian military statement said the shooting down of the plane was due to "Human Error " After the plane had flown near a "sensitive spot" belonging to Iran 's Revolutionary Guards Corps ends.

The airliner was mistaken for an "enemy aircraft", The Statement said.

hours later, The Man responsible for The Unit that was shot down the rocket, the revolutionary guards air and space commander of said Brig-Gen Amir Ali Hajizadeh journalists the plane was shot down by a short-range rocket exploded next to him.

The Iranian operators had kept the Boeing for a "cruise missile". They tried to communicate with him, and waited 10 seconds for an answer before you decide to Open Fire , The General said that.

He added that a request had been made, for a no-fly zone in the area prior to The Incident , but this was rejected. The reasons for this remain unclear.

In fact, it seems that the Iranian attacks on U.S. bases have no impact on the operations of Imam Khomeyni International Airport on Wednesday morning. Flight PS752 The Ninth was to take them to The Strikes , according to Flightradar24.

Iran is on the admission of responsibility is an attempt of de-escalation, says it remains the BBC's chief international correspondent Lyse Doucet

But an important question.

Gen Hajizadeh told the media that he informed The Authorities about what had happened on Wednesday - The Day of The Accident .

So, why did it take Three Days for Iran to admit it?

The President of Ukraine International Airlines, said: "We have not the slightest doubt that our team and our plane was not The Cause of this terrible crash".

But The Company has denied that the aircraft drifts from the expected course before The Crash . It officials have closed The Airport says.

the Ukrainian President Vladimir Zelensky called on Iran to punish those responsible. "We expect that Iran . to bring the culprits to the courts," he said.

And the Prime Minister of Canada, Justin Trudeau said: "We will continue to work with our partners around The World , to a complete and thorough investigation. "

Under The International Protocol, the country where the plane is crashing, usually results in The Investigation .

As the plane was in the United States, U.S. officials, including the National Transportation Safety Board (NTSB), would be. in General , the participation in The Investigation

Iran had initially transfer excluded any information to the US authorities, After All , in addition to the current tensions, the Two Countries have no diplomatic relations.

But, Iran 's representative to the UN, The International civil aviation organization, told Reuters on Thursday that Iran has invited formally the NTSB to participate in The Investigation , and it was agreed to assign an investigator.

Boeing, the aircraft manufacturer, has said it is ready to support investigations, and assist you with the NTSB.

it is unclear, However, what kind can be carried out by examination that it is now known, the plane crash, but was brought to the case.

The Passenger manifest lists 176 People - 15 children - enter your name and birth data, but not their nationality.

the Ukrainian Foreign Minister Vadym Prystaiko published originally the details said there were 82 Iranian, 63 Canadians, 11 Ukrainians, including all nine members of The Crew , 10 in Sweden, four Afghans, three British and three Germans on Board.

But, on 10. In January, Canada's Foreign Minister Francois-Philippe Champagne said The Number of Canadians who was on the plane now, suppose that 57.

The Federal government of the Ukrainian figures of language. He said it was not aware that any of its citizens had been on Board The Flight .

later it turned out that the three Afghan mother and her Two Children were in the asylum in the country passengers of the crashed flight.

the British Prime Minister Boris Johnson said on Thursday that four British citizens were on Board.

Some of the differences in the figures may be attributed to the fact, two nationalities.

Iran is the head of emergency operations, said 147 of The Victims were Iranian. That would mean that 65 of The Foreign nationals had two nationalities, which do not recognize Iran .

Source of news: bbc.com