The Star Tribune is one of the latest news organizations to receive a suspicious package labeled as Anthrax. None of the other letters have tested positive for the substance.
According to the Associated Press:
Minneapolis police say they don't believe the powder is actually toxic. The package, which included a compact disc, was received Thursday. FBI agents are on the scene.
On Wednesday, the FBI warned media outlets to be vigilant about opening their mail after a California man was arrested on suspicion of sending more than 100 hoax letters labeled "anthrax" to newspapers and TV stations.
The bureau says none of the packets has so far tested positive for hazardous material. Authorities warned that more mailings would probably be received in the next few days.
Calls to the Star Tribune and the Minneapolis Police Department were not immediately returned.