bellingcat
The Bellingcat site has a piece entitled "Confirmed : Russian Bomb Remains Recovered from Syrian Red Crescent Aid Convoy Attack" which includes this picture as well as several others. You may look at the others, but this one picture is apodictic proof 1) that the Russians (or Syrians) didn't do it and 2) that Bellingcat is a loyal servant of the Borg.

He spends a lot of efforts to establish that the metal piece is the tail piece of a Russian-made OFAB 250-270 Fragmentation High Explosive Bomb. No argument there, I'm sure it is. Said bomb has 92kg of explosive. Which is quite a lot.
  • If said bomb has exploded in this not very large room, all those cardboard boxes would be torn to pieces and burned. To say nothing of a lot more damage to the room itself. Therefore it did not explode in that room.
  • If said bomb was a dud and did not explode, where is the rest of it? Therefore the bomb is not a dud.
  • Therefore the bomb piece was put there to make it look as if the Russians had done it. (And not very competently either: note that it is supposed to have come through the ceiling and neatly placed itself underneath some undamaged cardboard boxes.)
  • If it is necessary to produce a fake picture, then the Russians didn't do it.
  • QED
And, as a bonus, by perpetrating this fraud, Bellingcat has also proved that he is a stooge of the war party.

A lot to deduce from one photo, isn't it? It used to be that it took more effort to disprove Bellingcat's fakes. He's losing his touch.