The source of the explosion is not clear. It's not a missile as the collateral damage does not suggest that. If explosive materials were placed, there are too many cameras that would have recorded that. If it was a truck bomb, the truck was driving towards Crimea which means it originated in Russia.

Russians living in Crimea are lining up at gas stations to return back to Russia (...where they belong.)



Vladimir Putin's mouthpiece speechless to hear Russia doesn't have enough weapons to win
via UK Mirror.co.uk

Contrarian, extraordinaire