Snooki was driving when she struck the cop car, but sources connected with the production tell TMZ, "Zero alcohol was involved."
We're told no one was injured.
A witness tells TMZ, Snooki smacked right into the back of the patrol car, wedging her ride between the car and a highway protection wall. The witness says Deena was in the passenger seat at the time of the crash -- and when she tried to exit the car, she had to go through the window ... because the door was blocked by the wall.
A source connected to the production tells TMZ, although Snooki is in custody ... it is not a formal arrest.
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