The Chicago Tribune reports that:

A U.S. Postal worker at the Lyons post office made a shocking discovery Saturday morning.

In a broken envelope, Mark Thompson could see what looked like a half-stick of dynamite, a bullet and white powder under a stack of packages and other mail.

Lyons Fire officials said the suspicious package was found at the west suburban post office, 7836 W. Ogden Ave., about 8:11 a.m. and officials activated a hazardous materials response.

The post office was evacuated as officials from the Cook County Bomb Squad responded along with several fire departments, according to Lyons police officials.

Tim Olk went to the scene and submitted several images.

Lyons Fire Department Haz-Mat Alarm at the Lyons Post Office 9-3-11

Hazmat technicians from MABAS Division 10 assemble near the hazmat squad to get the necessary equipment for entering the building. Tim Olk photo

Lyons Fire Department Haz-Mat Alarm at the Lyons Post Office 9-3-11

A briefing is conducted to discuss how the hazmat technicians will enter the building to examine and retrieve the package. Tim Olk photo

Lyons Fire Department Haz-Mat Alarm at the Lyons Post Office 9-3-11

Tow hazmat technicians exit the building. They are fully encapsulated in protective suits due to the unknown nature of the substance inside the building. Tim Olk photo

Lyons Fire Department Haz-Mat Alarm at the Lyons Post Office 9-3-11

Two firefighters from Bedford Park in basic protective gear stand outside the 'hot zone' to assist the entry team members. Tim Olk photo

Lyons Fire Department Haz-Mat Alarm at the Lyons Post Office 9-3-11

Lyons Squad 1312 is on a hydrant supplying water for companies working the scene. Tim Olk photo

Lyons Fire Department Haz-Mat Alarm at the Lyons Post Office 9-3-11

The Pleasantview rehab unit responded to the scene to assist firefighters. Tim Olk photo

Read the entire Tribune article HERE.

Tim has a large gallery with additional images HERE.

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