6 killed in mass shooting at 4th of July Independence Day parade in Chicago suburb of Highland Park

About 24 others were seriously hurt in a mass shooting

The event in the city of Highland Park was halted about 10 minutes after it began

The shooter – described as a white male with dark hair, 18 to 20 years old.

Video from the scene shows scores of people running for cover as music continues to play

"Our community was terrorized by an act of violence that has shaken us to our core," - Mayor Nancy Rotering

Police called it a "random act of violence."

"Prayers alone will not put a stop to the terror of rampant gun violence in our country," the governor wrote.