An Amityville man was arrested on drug possession and assault charges after authorities said he hit two police cars and injured an officer following a traffic stop Thursday in Lynbrook.

A woman in the car also was arrested — after police said she was in the car with her 5-year-old son.

Earl Larkin, 29, of North Emerald Lane, was charged with third-degree criminal possession of a controlled substance, third-degree criminal sale of a controlled substance, second-degree assault, second-degree criminal mischief, unlawful fleeing of a police officer and unlawful dealing with a child following his arrest near the intersection of Scranton Avenue and Broadway in Lynbrook at 9:21 p.m., Nassau County police said.

Also arrested was Dahayia Footman, 25, of Princeton Street, Hempstead. She was charged with unlawful dealing with a child.

The boy, whose identity was not released, was placed in the custody of his grandmother, police said.

He was not injured.

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Police said the incident occurred during a traffic stop by Lynbrook police and Nassau narcotics/vice squad detectives working with the Long Island Heroin Initiative. That stop of the 1998 Honda Accord driven by Larkin occurred on Freer Street, police said.

Police Larkin put the vehicle in reverse and “at a high rate of speed struck” a Lynbrook police vehicle. He then struck the front driver’s side door of another police vehicle, causing knee and back injuries to an officer, police said.

Police said Larkin then continued — with his headlights turned off — at “a high rate of speed” through the streets of Lynbrook, before he was finally stopped. It was then police discovered the child in the back seat of the car and arrested his mother, identified as Footman.

Both Larkin and Footman are scheduled for arraignment Friday in First District Court in Hempstead.