Pics, video or a DoD report or it didn't happen. We get this sort of stuff out of Iran every week if it isn't about developments of autonomous anti-gravity craft with lasers.
Iran would want to broadcast its victory of shooting down a single unmanned drone to the world. Moreso if its in a mildly harmed condition.
Iran's state media alone is not a credible source as has been proven numerous times in the past, and all these other articles seem to trace back there to its 'unnamed military official'.
Well if true it hardly matters. Drones are replaceable, you might as well cheer over destroying an m-16 rifle with a camera.