Two passenger jets clipped wings while preparing to take off on the runway of Newark Liberty International Airport.
Scandinavian Airlines Flight 908 on its way to Oslo struck its left wing against the tail of Nashville-bound ExpressJet Flight 4226, officials said.
The planes were taxiing for departure shortly before 7:30 p.m. on Wednesday.
No injuries were reported but video showed the Scandinavian Airlines plane with a broken wing after the incident.
Both planes returned to the gate and passengers disembarked.
"All 31 passengers deplaned the aircraft normally and were bussed to the terminal where they are being re-accommodated. ExpressJet is working in coordination with officials to determine the cause," United ExpressJet officials said in a statement.
WABC reports that flights at Newark were delayed by up to 45 minutes after the accident.