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,

There have been at least 180 drone sightings in Central Jersey. But the number of sightings outnumbers answers.

Federal investigators were pressed on Capitol Hill Wednesday about nearly a month of nightly drone sightings over New Jersey, causing growing concern among residents, military personnel and local officials.