The Kremlin has refused to comment, but Russia's civil aviation agency said the situation in Chechnya was "very complicated" at the time.

It was Christmas Day when a passenger plane crashed in western Kazakhstan, near the city of Aktau. Out of 67 people on board, 38 died and

A survivor of Wednesday’s Azerbaijan Airlines crash said the plane’s pilots tried to land in Grozny, Chechnya three times, followed by an explosion outside the plane, according to an audio recording shared by Russian TV channel RT.

On 25 December, 38 people died when an Azerbaijan Airlines flight, which had been due to land in Russia, crash-landed in Kazakhstan. The circumstances around the crash remain unclear, but limited evidence so far suggests it may have been damaged by missiles fired by a Russian air-defence system as it tried to land in Chechnya.

U.S. and Azerbaijani officials have said weapons fire may have brought down an Azerbaijani airliner that crashed on Wednesday, killing 38 people

"No one claims that it was done on purpose," an Azerbaijan official told Reuters. They added their government "expects the Russian side to confess."

Azerbaijan Airlines says the jet that crashed in Kazakhstan on Christmas Day experienced “physical and technical external interference,” according to an early investigation, as questions swirled about Russia’s possible involvement in the disaster.

There is U.S. intelligence that Russia may have mistakenly shot down an Azerbaijan Airlines flight that crashed in Kazakhstan on Wednesday after misidentifying it as an incoming drone, MSNBC reported on Friday,