By John Dodge

CHICAGO (CBS) — A mysterious device is being used by criminals to easily break into locked cars across the country, including here in Chicago.

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It has police stumped, CNN is reporting.

In Chicago, surveillance video shows a thief pointing a small box-like device at a car door.

Within seconds, the car unlocks, the alarm is disabled and the thief simply opens the passenger door and easily takes the valuables.

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The device is believed to be some sort of electronic hacking mechanism that overrides the car’s computer system.

Thieves across the country have been using it.

Police have no idea what it is, or exactly how it works, CNN reports.

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However, according to CNN, authorities in Texas have apparently seized one of the devices and are in the process of testing it.