ST. LOUIS, Mo.- A 51-year-old Southwest Airlines pilot was arrested Wednesday at St. Louis Lambert International Airport for unlawful use of a weapon.

According to ABC News, TSA officers discovered a loaded pistol in the pilot's carry-on bag around 4:45 a.m. Wednesday morning.

TSA Spokesperson Mark Howell said the Smith & Wesson was loaded with seven rounds of ammunition when it was discovered in the Southwest employee's carry-on bag. TSA alerted law enforcement who confiscated the gun and arrested the man.

An airport spokesman said the pilot did not have the authorization to carry a firearm.

Southwest Airlines issued a statement saying, "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."

Criminal charges are still unclear. Check back for updates.