I find it hard to believe that in an era of smartphones and all these gadgets, there's no picture, video or any other type of evidence except "unnamed sources".
As adamsmith143 pointed out, if that evidence exists, it's probably better to keep it out of sight of Iranian authorities. If that means you don't believe it, then that's what it is. Exposing sources is a bad idea.
Of course the evidence exists lol but you don't burn your sources if you ever want another hot tip and certainly not when it likely means a horrible death for them if you do.
