Officials say a man interested in the July 4 mass shooting has been taken into custody. Robert E. Cremo III was seen driving a silver Honda Fit in North Chicago hours after the attack.

When an officer tried to "start a traffic stop," the 22-year-old attempted to flee, Highland Park Police Chief Lou Jogman said at a briefing Monday evening.

"A brief search continued," but eventually Cremo released himself, Jogman said, adding that he was "taken into custody without incident."

Jogman said the investigation was progressing rapidly and noted that Krimo would be questioned by investigators in the department "to confirm or see whether he was, in fact, connected to the incident.

Jogman declined to call Cremo a suspect at this stage in the investigation. Police said they needed more information to link it to the shooting that killed six people and injured dozens more.

Lake County Coroner Jennifer Banek said at an earlier briefing that five of the six victims of the attack were adults, who died on the spot. All five have been identified.

When an officer tried to "start a traffic stop," the 22-year-old attempted to flee, Highland Park Police Chief Lou Jogman said at a briefing Monday evening.

Highland Park Fire Chief Joe Schrage said the sixth victim died at a local hospital. No additional information was provided.

Highland Park Fire Chief Joe Schrage said a seriously injured child was among about two dozen people taken to local hospitals. Some injuries include gunshot wounds to the abdomen and limbs.

NPR member station WBEZ reported that the "vast majority" of the injured are being treated for gunshot wounds. Some were "constantly injured as a result of the ensuing chaos at the parade."

Schrage said the crew at the scene reacted quickly, as did the witnesses who helped tie the tourniquets.