The jet crashed and exploded in a fireball while trying to land at an airport near Aktau.
With Post wires
The Kremlin has warned people against jumping to conclusions about the cause of the crash.
Azerbaijan held a national day of mourning on Thursday.
Close-up images of the wreckage of the Embraer 190 jet showed it had been hit by various fragments or other smaller objects before it.
On Friday, a U.S. official and an Azerbaijani minister each blamed the crash on an external weapon.
Russian President Vladimir Putin on Saturday apologized to Azerbaijan’s president for the “tragic incident” in Russian airspace where an Azerbaijani plane crashed in Kazakhstan and killed 38 people — but did not admit Moscow was responsible for the deaths.