The Embraer 190 was traveling to Grozny, Russia, but crashed near Aktau, Kazakhstan, killing 38 people onboard. Investigators are focusing on Russian air defense as the likely cause.

An Azerbaijani airliner has crashed in Kazakhstan after being diverted, killing 38 of 67 people on board. Some experts alleged that the plane went down after being hit by Russian air defense systems. Some things to know about the crash and the speculation about a possible cause:

The AZAL passenger plane went down in Kazakhstan due to external interference. They were received when the plane was in Russian airspace, states Azerbaijani President Ilham Aliyev. Aliyev noted that the passenger plane of Azerbaijan Airlines,

In a Dec. 27 phone conversation with Aliyev, Kazakh President Kasym-Jomart Tokayev discussed the progress of work of the special state commission to investigate the crash and assured that the Kazakh side will make every effort to ensure comprehensive and objective clarification of all circumstances of the crash.

An Azerbaijani airliner with 67 people onboard crashed Wednesday near the Kazakhstani city of Aktau, killing 38 people and leaving 29 survivors, a Kazakh official said.

On Christmas Day, a plane traveling from Baku, Azerbaijan, to Grozny, Russia, crashed in Kazakhstan, killing over half of its passengers. Theories abound regarding why the plane made an emergency landing near the Kazakhstani city of Aktau.

An Azerbaijan Airlines statement on Dec. 27 blamed “interference” for the Christmas Day plane crash that killed 38 people.

Russian President Vladimir Putin apologized for the deadly Azerbaijan Airlines Flight 8243 crash on Christmas but did not take responsibility for causing it as an investigation continues into the matter.