One of those incidents happened Friday in the parking lot of Delco Plaza on South Broadway in Hicksville.
Police say a man in his 20's was driving a dark colored car when he approached his victim.
A woman in the passenger seat grabbed the woman's purse causing her to fall and be dragged by the car.
Police say similar robberies have occurred in Levittown, Massapequa, Bethpage and Seaford this week.
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