Department of Homeland Security Secretary Alejandro Mayorkas offered a possible explanation for the recent uptick of drone encounters along the eastern seaboard—particularly in the skies above New Jersey—which have prompted concern among residents and lawmakers.

The FBI is among several agencies investigating and has asked residents to share videos, photos and other information they may have about the drones.

In the Garden State, where the rash of sightings started a month ago, residents are looking to the skies, wondering why they still don’t have definitive answers from officials.