Two Denver-bound planes clipped wings on the ground at the airport in Phoenix Thursday night.

No injuries were reported on either flight.

The Phoenix Sky Harbor Airport says a Southwest Airlines plane and Frontier Airlines plane clipped wings on a taxiway shortly after 8 p.m.

There were 163 passengers on board and a crew of six on the Frontier plane. It's unclear at this time how many people were aboard the Southwest flight.

The Southwest plane was taxiing in after landing, and the Frontier aircraft was pushing back from its gate when the incident occurred, according to the Federal Aviation Administration.

Damage to the planes is unknown.

The FAA is investigating.