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The doorbell-cam footage shows four people in hooded sweatshirts going car-to-car early Thursday morning on Lilchester Avenue checking for unlocked car doors.
"When they find one, they enter the vehicle and take whatever they wish," the police department said on Facebook.
"The best way to prevent yourself from being a victim is simply locking the vehicle doors."
Police urged residents to hide valuable items, put the GPS in a compartment and bring all bags and wallets inside -- along with vehicle keys.
Anyone with further information is urged to call the police department at 973-398-5000.
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