New Jersey state lawmakers say they have been briefed by security officials amid a joint federal and state investigation into weeks of unexplained drone sightings across the state that have prompted heightened security concerns from residents,

Gov. Phil Murphy says they pose no known threat, but Republican Rep. Jeff Van Drew is calling for the drones to be shot down.

Residents of New Jersey in the United States have been left puzzled and uneasy following nightly appearances of large, mysterious drones across the state’s skies. The drones, equipped with flashing lights and sophisticated technology, have been sighted every night since November 18, with their purpose and origins still unknown.