There have been developments on the thread below that are worth calling to your attention. New clues on the source of the explosion seem to point to it being a coalition HARM weapon, an anti-radar missile.

The serial numbers are a close match, but much more importantly, according to sources, the damage profile in the marketplaces, which does NOT match one of the conventional bombs, appears to be a close match to that done by a HARM missile.

This still does not rule out some sort of trick...it's still a hell of a coincidence. The Russians build HARM decoy devices. I am trying to find out more about this.