The cause of the Azerbaijan Airlines tragedy is under investigation, but the company is crediting “the crew's valiant dedication to their duties until the last moment”

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.

After an Azerbaijan Airlines jet crashed in Kazakhstan, speculation mounted about why the plane went down and whether possible Russian air defense action may have played a role.