Bright lights floating or flying in the night sky above New Jersey have captivated residents for nearly a month. Now the sightings, which many observers believe to be drones, have spread throughout the region.

Officials sound alarm over reports of the strange sights—seen over New Jersey, New York, Maryland and Pennsylvania—with one asking for a “limited state of emergency.”

Reported drone sightings at night in New Jersey and along the East Coast have sent lawmakers into a panic and spurred demands for an investigation, although federal officials continue to say there is no cause for alarm.