Flights have been grounded at Newark International Airport in the US state of New Jersey after two drones were spotted flying nearby.
A pilot told air traffic control that one of the drones came within 30ft (9m) of his aircraft.
He was flying at Teterboro Airport, a nearby private facility, but officials grounded Newark International flights as a precaution.
The airport is the 11th busiest in the US, with 20 million passengers a year.
The incident follows major disruption over the Christmas period at London's Gatwick airport, where apparent drone sightings grounded hundreds of flights over the course of three days.
Speaking about today's drone scare in New Jersey, the Federal Aviation Authority (FAA) said in a statement: "At approximately 5pm, we received two reports from incoming flights into Newark that a drone was sighted at about 3500ft above Teterboro, New Jersey.
"At that point, flights arriving into Newark were held for a short duration. Since then, and with no further drone sightings, arrivals have been resumed.
"However, we still have a ground stop in place at other airports departing for Newark until a backlog of arrivals can be cleared. We expect that to be lifted soon."