Three NBC executives said the letters contained threats against Israel.
Both the letters contained threats to Bloomberg and an oily pinkish-orange substance, Browne said.
Worse still, the notes contained threats of bombs, explosions and of targeting schoolchildren for mass slaughter.
He has used couriers to carry private instructions and issued public statements that contained threats and exhortations.
When reviews contained threats of violence or descriptions of violent crime, like rape and murder, they would contact the authorities.
The letters contained threats to President Bush, Vice President Dick Cheney and Representative John T. Doolittle, Republican of California, a statement from the F.B.I. said.
In September, the digital analytics firm Luminoso found about 4% of 4.5 million Donald tweetsrelated tweets contained threats to leave the country if the billionaire became president.
The judge, Leonie M. Brinkema of Federal District Court in Alexandria, Va., ordered last month that Mr. Moussaoui's handwritten court motions be barred from public release when they contained "threats, racial slurs, calls to action or other irrelevant and inappropriate language".
Two letters that contained threats to Mayor Michael R. Bloomberg — one addressed to him, the other to a lobbyist who works on his gun control campaign — have tested positive for the deadly poison ricin, the authorities said on Wednesday.
The FSA's initial draft in March contained threats to limit the share of bonuses that can be taken in cash, forcing at least two-thirds of the payout to be deferred and depend on future performance.
