A would-be airline passenger was arrested at the Detroit airport after a knife was found inside the bottom lining of a shoe in his carry-on luggage.
The Transportation Security Administration said the knife was found Sunday during security screening at Detroit Metropolitan Airport in Romulus.
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The TSA says the knife should have been placed in checked luggage, according to The Associated Press.
Airport spokesman Brian Lassa line said the incident happened about 7:30 a.m. at the airport's North Terminal.
He said airport police arrested and then released the man while the Wayne County prosecutor's office decides on charges.
Lassaline said finding the knife in the man's carry-on luggage shows "the security screening process working as it should" and says the incident didn't present a threat to public safety.
Authorities haven't released the man's name.
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