The arrests of seven motorcyclists and citations of another three dozen on Sunday was in an area well-known to police as a hangout for bikers and will now become the focus of future police crackdowns, Suffolk police said Monday.

The areas around Deer Park and Bay Shore -- including a lot behind a social services building and nearby gravel pits and piles along the Long Island Rail Road tracks -- have long attracted crowds of bikers, including the pack of motorcyclists who police said were terrorizing drivers Sunday along the South Shore.

Police plan to target the sprawling, industrial area to prevent future incidents, police said.

"The idea that that area is used for ATV and motorcycle riding is not unknown to us; It's certainly not sanctioned," Third Precinct Insp. Bob Brown said. "This kind of behavior isn't going to be tolerated. We'll be checking [where they're known to congregate] and trying to make certain these incidents don't develop in the future."

A group up to 50 motorcyclists drove recklessly on Main Street in Bay Shore, on westbound Sunrise Highway in West Islip and on Deer Park Avenue in North Babylon for about an hour Sunday, police said.

The drivers -- on motorcycles, dirt bikes and SUVs -- ran red lights, weaved in and out of traffic, made an illegal U-turn and fled the scene of a crash -- before police arrested the seven near the Deer Park LIRR station after several calls to 911.

Police ticketed 36 more on trespassing charges in a parking lot behind a county social services building at 2 South Second St. in Deer Park. Arrested were:

Joel Hernandez, 19, of Brentwood. Police said he backed into a police vehicle on Pine Aire Drive in Bay Shore. The officers in the vehicle were not injured. Hernandez was charged with reckless driving and fourth-degree criminal mischief.

Tomas Palacios, 35, of Bay Shore, was charged with driving while intoxicated on an ATV near Pine Aire Drive and Washington Avenue.

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Matthew Valentino, 25 of East Quogue, was charged with reckless driving after police said he was speeding and "swerving in and out of oncoming traffic" on Udall Road in Baywood, which caused "other vehicles to swerve off the roadway to avoid him."

Samuel Morales, 19, of Brooklyn, was driving a 2003 Ducati motorcycle when police said he passed vehicles on the right shoulder and ran a red light on Pine Aire Drive. He fell off his motorcycle, police said, and tried to flee. He was charged with driving without a motorcycle license, reckless driving and resisting arrest.

Jason Coleman, 29, of Yonkers, was driving a 2009 Yamaha motorcycle when he made an illegal U-turn in front of a 2004 Toyota sedan, which struck the motorcycle, police said. The other driver was uninjured. Coleman was charged with leaving the scene of an accident.

Tikret Cekic, 23, of Brooklyn, was speeding to flee from officers and drove though a red light on Pine Aire Drive, police said. He was charged with unlawful fleeing of a police officer.

A woman passenger on one of the bikes was charged with second-degree obstructing governmental administration, police said. She was not identified.

None of the defendants could be reached for comment.

Sunday's mayhem follows two recent high-profile incidents: On Oct. 17, seven motorcyclists were charged with speeding and driving recklessly on the Long Island Expressway. On Sept. 29, a pack of motorcyclists chased down and beat an SUV driver on the Henry Hudson Parkway in Manhattan. Several men have been arrested in that case."Anytime you have people trying to take evasive action on the road, it amplifies the already dangerous atmosphere of driving on the roads on Long Island," Brown said. "We take it very seriously."