The FBI on Thursday offered a reward of up to $100,000 for information leading to an arrest of those responsible for leaving a package containing the deadly poison ricin at a post office in October along with a note threatening large-scale attacks if the new hours of service rules - which became effective last weekend – were to go into effect.

The FBI released the following representation of the language contained in the threat letter:

to the department of transportation: I’m a fleet owner of a tanker company.

I have easy access to castor pulp. If my demand is dismissed I’m capable of making Ricin.

My demand is simple, January 4 2004 starts the new hours of service for trucks which include a ridiculous ten hours in the sleeper berth. Keep at eight or I will start dumping.

You have been warned this is the only letter that will be sent by me.

Fallen Angel

The letter and package were found Oct. 15 at the Greenville-Spartanburg International Airport postal facility.

The FBI is asking anyone with information to call this tip line: 1-866-839-6241.