Firefighters set up lights as responders converged on the area near Green Street in Teterboro at the South Hackensack border after receiving the report following a motor vehicle accident in Hasbrouck Heights shortly before 5:30 p.m., they said.
The responders combed the area intensively before canceling an ambulance.
"It appears unfounded," a ranking officer told Daily Voice just after 6 p.m.
They continued searching for another half hour, to be sure, before clearing the scene.
Police from Hasbrouck Heights, Moonachie and South Hackensack were among the responders.
Click here to follow Daily Voice North Hunterdon and receive free news updates.