Reminds me of something I heard on ABC radio on September 11, 2001, shortly after the second plane hit the WTC.
The report was that "The FBI has determined that this was NOT a terrorist attack" !
Now I don't remember if this "news" report was read by an ABC news national correspondent, or by our local morning radio personalities (Curtis Sliwa & Ron Kuby) at the ABC affiliate station, WABC-New York.
But I know I heard it!
Also, when the USS Cole was hit, I just happened to be surfing the AP's international news headlines, and saw a tiny article about it there. I rushed to turn on the radio and TV -- but heard absolutely nothing about it reported on air for several hours.
I remember listening to WABC on 9/11 as well, and hearing what you heard. See my post 155.