It all began just before 10:30 a.m. when workers were digging in the 500 block of Barrett Street and unearthed a device that they thought might be explosive.
Members of the Wilmington Police Explosive Ordnance Disposal team arrived on the scene, evacuated the block and set up a safety perimeter.
As a precaution, police locked down Harlan Elementary School at 3601 N. Jefferson Street.
Authorities said the school was safe and that the lockdown was ordered as a precaution.
Wilmington Police Corporal Mark Ivey told Action News police wanted to make sure children from that school did not accidently wander into the area.
The P.S. DuPont Middle School at 701 W. 34th Street was also deemed safe and was not evacuated.
Authorities have since cleared the scene.