UPDATE — 5:05 p.m. — Officials announced just before 5 p.m. that the school was no longer on lockdown. Police said that before 4:30 p.m. they arrested a man and a woman who had fled after their car, which had been reported stolen, crashed near the campus.

No weapons were found despite initial concerns that one of the suspects was armed because the car was connected to a New York burglary in which a handgun had been reported stolen.

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HIGHTSTOWN - Parents picking up their children from the Peddie School in this Mercer County borough were greeted by the sight of many police around the building.

According to the school's website, "at approximately 2:15 p.m., Peddie campus went into lockdown after being notified by local police that a criminal suspect was in the area. Police are searching campus and the neighboring areas."

An email from headmaster Peter Quinn said that Hightstown Police "are looking for a couple who fled from a car crash on foot, and one of the couple is thought to be armed" and that no intruder was seen on campus.

"This is a precautionary lock-down. No intruder was seen on campus. The children reported quickly to their assigned locations with faculty and staff also in safe spaces. They will remain in lock down until Hightstown police give us a release," Quinn wrote.

Quinn also said no one is allowed to drive on campus until further notice.

"The police are doing their job all over town and on campus. It will hinder the search if you come now."

A parent told New Jersey 101.5 that police would not let parents near the school and that police from East Windsor, West Windsor and State Police were all there. Several streets around the school on South Main Street were also closed. He said that K9 dogs are on campus and the students have been told not to use their phones.

The East Windsor School District on their website said they are reouting buses away from a secured area around the perimeter of the Peddie Campus on Etra Road, E Ward and S Main Street. Parents of children on affected buses are being notified.

The Peddie School is a private high school with an enrollment of 564 girls and boys from 25 states  and 38 foreign countries.

This is a breaking story. Check back for more information.

Contact reporter Dan Alexander at Dan.Alexander@townsquaremedia.com.