The child apparently went into cardiac arrest after the 6:30 p.m. crash at Chamberlain Avenue and Convery Boulevard, they said.
Firefighters extricated victims, four of whom responders said were hospitalized or treated at the scene.
The intersection and surrounding streets were closed off for an investigation by the Middlesex County Prosecutor’s Crash Investigative Unit and Perth Amboy police.
Authorities temporarily withheld specifics pending notifications.
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