This is a lie, of course, but one impossible to kill.
They said (accurately) that at the time they had no indications it was terrorism.
And they still don't.
And they still don't.
Dude, I heard the report that it wasn't terrorism with my own two ears. It was only said once. The very next report said they had no indications it was terrorism. I guess they realized just how stupid it sounded, and promptly added the weasle words...