AP carried it first, slowly being picked up worldwide for what it is worth, guess the press is a bit busy with this rainshower in NY for them to notice anything else....
You need to distinguish between:
1 - someone claiming to have directly seen such report
2- other press agencies reporting on the fact that said someone is claiming to have seen the report, whilst nobody else has and the authorities are denying the claim as ridiculous and unfounded
They're two completely different pieces of news.