DENVER - Bank employees opened an envelope containing suspicious substances Sunday morning, prompting an eventual call to the military.
Employees at the UMB Bank at 6900 E. Hampden Avenue were processing bill payments at around 6:20 a.m. Sunday when they opened an envelope containing three white capsules and three yellow capsules.
One of the capsules had burst open.
Bank employees said they immediately called the police and fire department.
Firefighters tested the substance and determined it was a complex protein, possibly a biological agent.
Deciding not to take any chances, the firefighters called in the military.
The Civil Support Team from Buckley Air Force Base arrived with a mobile chemical lab, dressed in protective suits and conducted more tests.
They eventually ruled out all worst case scenarios, including anthrax.
The bank was not open to customers at the time and no one was hurt.
Employees were decontaminated, monitored for health reasons and allowed to leave after about 10 hours.
The Salvation Army provided food to the employees at around 2 p.m. since they were not allowed to leave the bank for precautionary reasons.