Speculations with unconfirmed reports said that Russian air defense system probably mistook the plane for an Ukrainian drone.

Mobile phone footage circulating online appeared to show the Azerbaijani Airlines plane making a steep descent before slamming into the ground in a fireball in western Kazakhstan.

The Azerbaijan Airlines flight from Baku to Grozny in Russia was carrying 67 people when it crashed near Aktau early Wednesday. 25 people survived, Kazakhstan's emergencies ministry said.

Flight was operating in an area where Moscow’s air defenses have battled Ukrainian drones in recent weeks.

According to Kazakhstan's Transport Ministry, the plane operated by Azerbaijan Airlines had 37 Azerbaijani passengers, 16 Russians, six Kazakhs, and three Kyrgyz, along with five crew members on board.

Russia’s state aviation authority said the Azerbaijan Airlines plane had been trying to make an emergency landing. The Kazakh authorities said that at least 29 people survived.

An Embraer passenger jet crashed near the city of Aktau in Kazakhstan on Wednesday, killing 38 people, after diverting from an area of Russia that Moscow has recently defended against Ukrainian drone attacks.

An Azerbaijan Airlines passenger jet crashed on Wednesday in western Kazakhstan after travelling far off course, killing 38 of the 67 people on board, officials said.Azerbaijan Airlines reported that 67 people were on board -- 62 passengers and five crew members.

Speculation has emerged that Russian air defenses may have played a role, with some questioning, "This doesn't seem like birds."

A passenger captured footage inside an Azerbaijan Airlines Embraer 190 jet moments before and after it crashed near Aktau, Kazakhstan. The plane, en route from Baku to Grozny, was diverted due to fog and an emergency incident,

Experts believe the flight crew of an Azerbaijan Airlines jet that crashed on December 25 was struggling to control the plane in its last moments, they say. No official cause has been given yet for the crash,