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.

The FBI and local police are investigating. Authorities have said that the drones aren’t a security threat, but have not provided additional details on who they belong to or what they're for.