Two airplanes have again clipped wings at Newark Liberty International Airport for the second day in a row.

Authorities say a United Airlines plane was backing out of a gate Wednesday evening when it made contact with an Austrian Airlines plane, which was parked at another gate.

The incident comes a day after a United Airlines plane and a Lufthansa plane clipped wings while on the ground at Newark.

A spokeswoman for Chicago-based United said Tuesday that the United plane was at a stop when the empty Lufthansa plane made contact with it. A spokeswoman for Cologne, Germany-based Deutsche Lufthansa AG disputed that, saying its aircraft was parked when it was damaged.

No one was hurt in either incident.

Both incidents remain under investigation.