Four people were injured in the two-vehicle accident just before 5 p.m. at the YMCA on John T O'Leary Blvd in South Amboy, including one who was taken to a hospital in a medivac.
It's not clear what caused the initial accident and how one of the vehicles ended up hitting the side of the building.
The conditions of the injured is also not yet known.
The South Amboy YMCA will also be closed until further notice according to their Twitter account.