A yellow powder that prompted a hazardous materials investigation and scrubdown of employees at a Denver bank yesterday was not anthrax or any kind of weapon.
Firefighters say workers at the U-M-B Bank were opening commercial bill payments when they found five capsules containing powder in an envelope with no return address, letter or payment slip. Employees called 911 after two capsules containing yellow powder ruptured.
About 40 firefighters and specialists from nine government agencies, including the FBI, responded to the scene. The group included a team of chemical agent specialists from Buckley Air Force Base.
Additional tests will be required to determine what the substance is.