Azerbaijan has observed a day of mourning for the victims of a plane crash that killed 38 as speculation grows about a possible cause of the disaster, with reports the airliner was damaged by Russian air defence fire.

The wreckage of Azerbaijan Airlines Embraer 190 lays on the ground near the airport of Aktau, Kazakhstan, Wednesday, Dec. 25, 2024.
The wreckage of Azerbaijan Airlines Embraer 190 lays on the ground near the airport of Aktau, Kazakhstan, Wednesday, Dec. 25, 2024. (Source: Associated Press)

Azerbaijan Airlines’ Embraer 190 was en route from Azerbaijan’s capital of Baku to the Russian city of Grozny in the North Caucasus yesterday when it was diverted for reasons yet unclear and crashed while making an attempt to land in Aktau in Kazakhstan after flying east across the Caspian Sea.

The plane went down about 3 kilometres from Aktau.

Cellphone footage circulating online appeared to show the aircraft making a steep descent before smashing into the ground in a fireball.

In this photo taken from a video released by the administration of Mangystau region, the wreckage of Azerbaijan Airlines Embraer 190 lies on the ground near the airport of Aktau, Kazakhstan
In this photo taken from a video released by the administration of Mangystau region, the wreckage of Azerbaijan Airlines Embraer 190 lies on the ground near the airport of Aktau, Kazakhstan (Source: Associated Press)

Other footage showed part of its fuselage ripped away from the wings and the rest of the aircraft lying upside down in the grass.

Preliminary findings from Azerbaijan’s investigation into the disaster have determined that Russian air defence systems were responsible for downing the plane, Reuters reports, citing four anonymous sources with knowledge of the inquiry.

“No one claims that it was done on purpose. However, taking into account the established facts, Baku expects the Russian side to confess to the shooting down of the Azerbaijani aircraft,” one source told Reuters.

The New York Times also reported, citing two sources, that government investigators believe the aircraft was damaged by Russian fire,

As the official crash investigation started, theories abounded about a possible cause, with some experts also alleging that holes seen in the plane’s tail section possibly indicate that it could have come under fire from air defence systems fending off a Ukrainian drone attack.

In this photo taken from a video released by the administration of Mangystau region, the wreckage of Azerbaijan Airlines Embraer 190 lies on the ground near the airport of Aktau, Kazakhstan
In this photo taken from a video released by the administration of Mangystau region, the wreckage of Azerbaijan Airlines Embraer 190 lies on the ground near the airport of Aktau, Kazakhstan (Source: Associated Press)

Ukrainian drones had previously attacked Grozny, the provincial capital of the Russian republic of Chechnya, and other regions in the country’s North Caucasus.

An official in Chechnya said another drone attack on the region was fended off on Wednesday (local time), although federal authorities didn’t report it.

On Thursday (local time), national flags were lowered across Azerbaijan, traffic across the country stopped at noon, and signals sounded from ships and trains as the country observed a nationwide moment of silence.

Speaking at a news conference, Azerbaijani president Ilham Aliyev said that it was too soon to speculate on the reasons behind the crash, but said that the weather had forced the plane to change from its planned course.

“The information provided to me is that the plane changed its course between Baku and Grozny due to worsening weather conditions and headed to Aktau airport, where it crashed upon landing,” he said.

Russia’s civil aviation authority, Rosaviatsia, said that preliminary information indicated that the pilots diverted to Aktau after a bird strike led to an emergency on board.

According to Kazakh officials, those aboard the plane included 42 Azerbaijani citizens, 16 Russian nationals, six Kazakhs and three Kyrgyzstan nationals. Russia’s Emergencies Ministry on Thursday flew nine Russian survivors to Moscow for treatment.

Mark Zee of OPSGroup, which monitors the world’s airspace and airports for risks, said that the analysis of the images of fragments of the crashed plane indicate that it was almost certainly hit by a surface-to-air missile, or SAM.

“Much more to investigate, but at high level we’d put the probability of it being a SAM attack on the aircraft at being well into the 90-99% bracket,” he said.

Osprey Flight Solutions, an aviation security firm based in the United Kingdom, warned its clients that the “Azerbaijan Airlines flight was likely shot down by a Russian military air-defence system.” Osprey provides analysis for carriers still flying into Russia after Western airlines halted their flights during the war.

Osprey CEO Andrew Nicholson said that the company had issued more than 200 alerts regarding drone attacks and air defence systems in Russia during the war.

“This incident is a stark reminder of why we do what we do,” Nicholson wrote online.

“It is painful to know that despite our efforts, lives were lost in a way that could have been avoided.”

Caliber, an Azerbaijani news website, claimed that the airliner was fired upon by a Russian Pantsyr-S air defence system as it was approaching Grozny.

It questioned why Russian authorities failed to close the airport despite the apparent drone raid in the area. Khamzat Kadyrov, head of Chechnya’s Security Council, said that air defences downed drones attacking the region on Wednesday.

Caliber also asked why Russian authorities didn’t allow the plane to make an emergency landing in Grozny or other Russian airports nearby after it was hit.

Asked about the claims that the plane had been fired upon by air defence assets, Kremlin spokesman Dmitry Peskov told reporters that “it would be wrong to make hypotheses before investigators make their verdict.”

Kazakhstan’s parliamentary speaker Maulen Ashimbayev also warned against rushing to conclusions based on pictures of the plane’s fragments, describing the allegations of air defence fire as unfounded and “unethical.”

Other officials in Kazakhstan and Azerbaijan have similarly avoided comment on a possible cause of the crash, saying it will be up to investigators to determine it.

Additional reporting by 1News