Channel 2 News tonite said that according to the German magazine Die Zeit, some agents of the Mossad were monitoring 9/11 hijacker Mohammed Atta and his roommate in Florida. They reportedly warned the US gov't that Atta was planning a major attack, but their warnings were not heeded and the agents were expelled.

More:

Alis writes:

Here is the original German article:

http://www.zeit.de/2002/41/Politik/print_200241_fahndungspannen.html

I guess a computer translation would give a good idea of it.

It does describe a meeting between Mossad and CIA agents under "Langely, 23. August 2001". There is neither a specific mention of Atta, merely of "4 out of 19" terrorists, nor of an expulsion of the Mossad agents.

Channel 2 said that the surveillance was done in December 2000.