Russia’s aviation chief says that a Ukrainian drone attack was under way in the region of Chechnya at the time an Azerbaijani airliner attempted to land before diverting to Kazakhstan and crashing the

Azerbaijan Airlines has suspended flights to multiple Russian airports in the wake of a deadly plane crash, which it attributed to "physical and technical external interference."

Early indications suggest a Russian anti-aircraft system may have downed the passenger jet that crashed in Kazakhstan, a US official told CNN, as authorities recovered a second black box that they hope will shed light on the cause of the disaster that killed dozens of people.