A reported drone sighting halted flights at Newark Liberty International Airport on Tuesday night, aviation officials said.

Two reports from incoming flights to Newark said a drone was sighted at about 3,500 feet above Teterboro at 5 p.m., a Federal Aviation Association spokesman said. Flights later resumed Tuesday night.

"However we still have a ground stop in place at other airports departing for Newark until a backlog of arrivals can be cleared," an FAA spokesman said at about 7 p.m. Tuesday. "We expect that to be lifted soon."

Officials at the Port Authority said on Twitter they plan to coordinate with the FAA and are "fully supporting all federal law enforcement authorities as they investigate this incident."

Sherlon Christie, a sports reporter at APP.com, was on a flight back from Kansas City. His flight was diverted to Pittsburgh because of a fuel shortage on the plane.

"Once we landed in Pittsburgh, we were told there was a total ground stop and we don’t know when that’s expected lifted," Christie said. "I might be stuck here."

Some passengers said their flight was diverted to Philadelphia.