An Azerbaijan Airlines flight that crashed in Kazakhstan on Wednesday was downed by a Russian air defence system, four sources in Azerbaijan with knowledge of the investigation told Reuters. An Embraer passenger jet crashed near the city of Aktau in Kazakhstan on Wednesday,

An Azerbaijan Airlines plane that crashed on Christmas Day was “likely shot down by a Russian military air defence system,” a UK-based aviation security firm has said. The community is coming together to remember a man killed in a Waukesha County crash that happened on Tuesday, Dec. 24.

The flight was en route from the Azerbaijani capital of Baku to Grozny, in Russia’s south, when it diverted and attempted an emergency landing in Kazakhstan.