June 28 (Reuters) - The Federal Aviation Administration

said on Friday it will investigate a Southwest Airlines ( LUV )

flight that departed from a temporarily closed runway in Maine

earlier this week.

The FAA said on Tuesday an airport vehicle exited the runway

before Southwest Flight 4805, a Boeing 737, began its takeoff

roll and departed around 5:45 a.m. local time (0945 GMT).

Southwest ( LUV ) said it is engaged with the National Transportation

Safety Board and FAA to understand the circumstances of the

departure. After the incident the plane continued safely to

Baltimore, Southwest ( LUV ) said.