ST. LOUIS (CBSLA) – A 51-year-old Southwest Airlines pilot has been arrested in St. Louis Lambert International Airport after a loaded pistol was found in his carry-on bags early Wednesday morning, according to airport officials.

A TSA agent discovered a loaded 9mm pistol in the pilot’s luggage during screening, the airport said. The pilot was detained before 5 a.m. local time and charged with unlawful use of a weapon.

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“The suspect did not have any conceal and carry permit or any other authorization to carry a firearm,” the airport said in a statement.

The suspect, a first officer, was scheduled to pilot Southwest flight 1106 from St. Louis to Las Vegas.

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Southwest provided CBS2 the following statement:

“We are aware of a situation involving a Southwest Pilot at St. Louis Airport. We are currently working alongside the appropriate authorities to gather more information. We have no further information to share at this time.”

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The pilot’s name was not immediately released. More charges could be pending.