KANSAS CITY — Authorities are investigating after a suspicious envelope arrived Tuesday at the U.S. District Court in Kansas City.
Employees reported to authorities that the envelope was leaking a yellowish-green powdery substance.
The FBI says the envelope was mailed from a Jefferson City prison and addressed to the chief clerk.
A hazardous materials crew was dispatched to the courthouse. Preliminary tests results revealed that the substance was not hazardous.
No one was injured, and the building was not evacuated.
The FBI and U.S. Postal Service are investigating.