AN employee of 15 years who was being fired from a suburban Chicago manufacturing company killed five co-workers and wounded five police officers, authorities said.

Police chief Kristen Ziman said that Gary Martin shot at officers as soon as they entered the Henry Pratt company building in Aurora – 40 miles west of Chicago.

Ziman said that Martin, 45, was also killed.

She told a news conference that in addition to the five employees killed, a sixth worker was taken to a hospital with injuries that were not life threatening.

A sixth police officer suffered a knee injury while officers were searching the building.

Ziman said officers arrived within four minutes of receiving reports of the shooting and were fired upon as soon as they entered the 29,000-square-foot manufacturing warehouse.