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.

The plane was diverted from Russia and had its GPS jammed before crashing in Kazakhstan, killing 38.