GRAND JUNCTION, Colo. (KKCO) -- If you see unusual activity around the U.S. Postal Service annex building on Patterson Road Thursday, there's no need to worry.
The Post Office is conducting a full scale drill at the building on 25 ½ Road, which will include an alert by a bio-detection device.
Officials say the device will detect anthrax on mail and the drill will include the fire department decontaminating USPS employees on-site.
The Mesa County Health Department will also practice dispensing medication.
Grand Junction Police officers may be simulating security and traffic control around the area.
The drill runs from 10 a.m. to 1 p.m., and officials say it's not necessary to call 911 if you see strange activity near the intersection of 25 1/2 and Patterson roads.