A day after an Azerbaijani airliner’s crashed in Kazakhstan, aviation experts say the plane most likely went down after being hit by Russian air defense systems.

Russian aviation authorities said the Azerbaijan Airlines plane had hit a flock of birds. But some experts cast doubt on that account, pointing to footage showing apparent holes in the fuselage.

A plane carrying seven people injured in the Azerbaijan Airlines' Embraer 190 crash arrived at Heydar Aliyev International Airport in Baku on Thursday evening. The plane was en route from Azerbaijan's capital of Baku to the Russian city of Grozny in the North Caucasus on Wednesday when it was diverted and crashed while making an attempt to land in Aktau,