Authorities say a large crowd was gathered on the outdoor courts at Wilde Memorial Park when there was a disturbance and a man was shot.
The 23-year-old man was taken to the hospital and released.
Several Glen Rock students and their families were at the park for baseball games and witnessed the shooting.
Superintendent Brett Charleston said they are grateful that no students, parents, staff members or other members of the school community were harmed.
Charleston said school counselors and members of the crisis management team will be readily available at all schools for anyone who may need support or counseling.
Glen Rock is a peaceful Bergen County community where crime is relatively low. The shooting happened across the street from the police department and city hall.
No arrests have been made and the investigation is ongoing.
Anyone with information is asked to contact the BCPO Tip Line at 201-226-5532.
MORE NEWS: NJ man accused of attacking mechanic with bleach at service station
NJ man accused of attacking mechanic with bleach at service station
----------
* Get Eyewitness News Delivered
* More New Jersey news
* Send us a news tip
* Download the abc7NY app for breaking news alerts
* Follow us on YouTube