Rep. August Pfluger asked Robert Wheeler, an assistant FBI director, what is happening with regard to the mass UFO sightings taking place in New Jersey over the past few weeks during a Homeland Security hearing on the topic on Tuesday.

A senior FBI official told the House Homeland Security Committee Wednesday the recent drone sightings above New Jersey are "concerning," and said the agency is "actively investigating" the situation and trying to determine who is responsible.

FBI Assistant Director Robert Wheeler testified before Congress about the dozens of mysterious drone sightings reported over New Jersey in recent weeks. When asked if there was any risk to Americans,