A 21-year-old man accused of killing seven people and wounding dozens of others in a shooting at a Fourth of July parade in Highland Park, Illinois, confessed to carrying out the massacre to police, prosecutors said on Wednesday. 

Lake County Assistant State Attorney Ben Dillon said during a bond hearing that the shooting suspect made a "voluntary statement" to authorities admitting that he was the gunman behind Monday's rampage.

Dillon said the shooting suspect identified himself and the high-powered rifle used in the attack on surveillance footage. 

Authorities say that the gunman fired off more than 70 rounds from a rooftop onto crowds of parade-goers below during the massacre in the Chicago suburb. 

The shooting suspect was held without bond at his first court appearance on Wednesday. A preliminary hearing was scheduled for July 28.

He has been charged with seven counts of first-degree murder for the massacre.

This story is developing. Please check back for updates.

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