A man was arrested after he stripped down to his boxer shorts, scaled a fence and rammed a pickup truck into a Southwest Airlines plane parked at Eppley Airfield on Thursday in Omaha, Nebraska, police said.

Two crew members suffered minor injuries on the Southwest flight, bound for Denver, as passengers were boarding at 9:30 p.m. when the man drove the truck into the plane's nose gear, said Omaha Airport Authority Chief of Police Tim Connahan.

One of the 18 passengers on board was also injured in the incident, the airline said in a statement.

The unidentified man was taken into custody and there was no suggestion the incident was an act of extremism, Connahan said.

He said airport security personnel had noticed a man "acting in a bizarre manner" near the perimeter of the airport. The man then stripped down to his boxer shorts, climbed over a fence and ran onto an airport runway as officers gave chase.

The man then jumped into a parked truck, which had its engine running, and drove it into the nose gear of the plane. He was then apprehended by police, Connahan said.