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.

U.S. officials say Russia could be behind a passenger plane crash in Kazakhstan that left dozens dead on Christmas Day. U.S. officials say it looks like the plane was hit by a Russian air defense system,

On Wednesday, a tragic crash involving an Embraer-190 aircraft operated by Azerbaijan Airlines occurred in western Kazakhstan. Preliminary information suggests that the cause might have been a surface-to-air missile explosion.