"This was not the enemy," White House press secretary Karoline Leavitt said about New Jersey's mysterious drone sightings.

A local congressman isn't satisfied with the White House's answers about the mysterious drones seen across New Jersey skies late last year.

The mysterious drones that lit up skies across the US late last year were authorised by federal regulators and "not the enemy," the White House has announced. The Federal Aviation Administration (FAA) had approved the drones for research and many also belonged to people in the area,