Two Injured When Plane Rolls Off Runway at Nashville Airport

Two people suffered minor injuries Tuesday when a Southwest Airlines jet carrying 138 passengers and crew rolled off a runway at Nashville International Airport in Tennessee, authorities and the airline said.

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Southwest Airlines Flight 31, a Boeing 737 aircraft flying from Houston, rolled off a taxiway into the grass and got stuck while taxiing to its gate about 5:30 p.m. (6:30 p.m. ET), authorities told NBC News. Passengers left the aircraft by stairs and were bused to the terminal.

The Nashville Fire Department said three people were transported to TriStar Summit Medical Center. Fire officials told NBC station WSMV that two of the people suffered minor injuries, while the third reported experiencing chest pain.

The Federal Aviation Administration is investigating.

Southwest Airlines said in a statement that flight 31 from Houston Hobby Airport to Nashville International Airport exited the taxiway shortly after arriving into Nashville, as the airplane was approaching the gate.

"The 133 passengers and five crew members were safely transported into the airport, and we are currently working to support their needs. The safety of our customers and employees remains our primary focus," Southwest wrote.