A United Airlines plane's wing clipped the tail of another jetliner Tuesday morning as they taxied toward takeoff at O'Hare International Airport, aviation officials said. No injuries were reported.

One of the planes was turning left when the tip of its wing hit the tail of the second plane, another United flight, immediately behind it, said Chicago Department of Aviation spokeswoman Wendy Abrams.

Both flights were canceled, United said on its Web site.

Abrams said the airline was inspecting the aircraft and the Federal Aviation Administration and National Transportation Safety Board were being notified.

Flight 672, a Boeing 737, to New York's LaGuardia Airport had 110 passengers and Flight 732, an Airbus 320 en route to Dulles International Airport outside Washington, carried 96 passengers.

In a similar accident last month at Newark Liberty International Airport outside New York, one wing of a Lufthansa Boeing 747 bumped the wing of an empty Continental Airlines Boeing 757 that was awaiting a tow to a parking area, Continental spokeswoman Mary Clark said. No injuries were reported.