NEWARK — Two airplanes taxiing while preparing for takeoff at Newark Liberty International Airport clipped each other, leaving one of the planes with a portion of its left wing ripped away.

No one was injured when the planes touched around 7:30 p.m. Wednesday at one of the nation’s busiest airports, Federal Aviation Administration officials said. A Scandinavian Airlines plane’s left wing clipped the tail of a United Airlines plane while they were on a taxiway. Photos and video from the scene showed a significant portion of the left wing jaggedly torn off.

Scandinavian Airlines Flight 908, bound for Oslo, Norway, was directly behind ExpressJet Flight 4226, destined for Nashville, Tenn., on the taxiway and was turning right to get onto another taxiway when its wing clipped the ExpressJet plane’s tail, officials said.

The ExpressJet plane was towed back to the gate, and the Scandinavian Airlines plane taxied back to the gate, where passengers disembarked, New York’s WNBC-TV reported.

The accident is being investigated. Scandinavian Airlines, which has hubs in Norway, Sweden and Denmark, didn’t immediately respond to telephone messages and emails seeking comment.

ExpressJet Airlines released a statement Wednesday night saying it is “working in coordination with officials to determine a cause.” All 31 passengers on the plane were re-accommodated, the airline said.

ExpressJet, which bills itself as the world’s largest regional airline, operates as a United Express partner from United’s Newark hub. United, which has headquarters in Chicago, is part of United Continental Holdings Inc.