Moscow on Thursday warned against speculation that Russian air defenses may have caused the crash of an Azerbaijan Airlines plane in Kazakhstan this week that killed 38 people. Kremlin

Officials in Russia and Kazakhstan are urging people to wait for an investigation into the deadly Azerbaijan Airlines plane crash before assigning blame.

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:

Even as a probe was starting of the crash of an Azerbaijan Airlines airliner in Kazakhstan, speculation was mounting about why the plane went down.

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 Azerbaijan Airlines passenger aircraft crashed near Kazakhstan's Aktau Airport close to the Caspian Sea on Wednesday morning.

Aviation experts say that Russian air defense fire was likely responsible for the Azerbaijani plane crash the day before that killed 38 people and left all 29 survivors injured

Kazakh authorities have recovered the flight data recorder and an investigation is under way. Shortly after the crash, reports from Russian state-controlled TV said the most likely cause was a strike from a flock of birds.

Azerbaijani President Ilham Aliyev said at a news conference that it was too soon to speculate on the reasons behind the crash, pointing to bad weather as the reason the plane diverted from its original course. "This is a great tragedy that has become a tremendous sorrow for the Azerbaijani people," he said.

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.

The Azerbaijan Airlines flight from Baku to Grozny in Russia was carrying 67 people when it crashed near Aktau early Wednesday. Kazakh officials said 29 people survived.