Delaware Department of Transportation officials and police believe someone intentionally cut the lines, which deactivated the area's traffic signals. Both lines were located underground and covered by a concrete lid.
To cut the fiber optic lines, police said someone would need an industrial tool. A smaller tool could have been used to cut the power line.
The vandalism caused $8,000 in damage and risked drivers' safety. Police said there were no car accidents while the traffic signals were out of service.