A Land Rover ended up on its side after the crash with a Toyota sedan near the intersection of Yawpo Avenue and Ramapo Valley Road.
A child and an adult with minor injuries were taken to Chilton Medical Center in Pompton Plains.
Three others refused medical attention, including a woman whose car was rear-ended in the multi-vehicle collision, which pushed the marked police unit nearly 50 feet into another space.
Boyd A. Loving contributed to this account.
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