Azerbaijan Airlines said the aircraft had been forced to make an emergency landing at Aktau airport.
Russia’s aviation watchdog said in a statement that preliminary information suggested the pilot had decided to make an emergency landing after a bird strike.
Ramzan Kadyrov, an ally of Vladimir Putin and leader of Chechnya, expressed his condolences and said those being treated in hospital were in an extremely serious condition and that he and others would pray for their rapid recovery.