What was the reason behind Russian Antonov An-148 fight accident?

[Airocraft]

What was the reason behind Russian Antonov An-148 fight accident and what was the investigation report?

[Petertenthije]

Perhaps the first preliminary report can come out in a month or two. The final report will take a lot longer to be completed. An aircraft crash investigation takes a long time.

[LUNN]

Strange coincidence that there are plane crashes in Russia and Iran in just a week after an Israeli fighter jet is shot down after targetting Russia-Iran nexus forces in Syria. Mossad can make it seem like an ordinary accident.

Even Iran took revenge for Iran Air A300 downing by US Navy in 1988, indirectly being involved in Pan Am 747 bombing same year.

Also, Russia may have been behind Egyptair A320 crash as revenge for Metrojet A321 bombing in Egypt.