[heero_yuy]

Quote from The Sun:

Iran blamed “technical problems” for the deadly fireball, and have locked down the crash site and refused to release the black boxes to international authorities.

But aviation experts have now suggested a “shootdown” was the most likely explanation for the disaster.

The OPS group, an aviation risk monitoring group, said: “We would recommend the starting assumption to be that this was a shootdown event, similar to MH17 – until there is clear evidence to the contrary."

They highlighted pictures of the crash site which they said "show obvious projectile holes in the fuselage and a wing section".

Aviation expert Julian Bray told Sun Online: "This is catastrophic and not the type of crash that comes from an engine failing. There would have been nothing that anyone could do.

"It is very unusual, you would expect to see some wreckage but all we can see here is debris."

Debris pictures and story on link above. The holes in the fusilage certainly look like they were made by some sort of small projectile.