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The FBI was called Sunday after a loaded gun magazine was found on a Frontier Airlines plane at Hartsfield-Jackson International Airport in Atlanta.

Just after 4:30 p.m. Saturday, officers assigned to the airport responded to a call about a gun magazine found near Frontier Airlines Gate C-6 in Concourse C, according to a news release from the Atlanta Police Department (APD).

A passenger on the Airbus A320 aircraft discovered what appeared to be a loaded magazine containing ten hollow point rounds near seat 7A, according to the release.

Police said the magazine, marked with the initials “K H,” was found during boarding for a turnaround return flight to Cincinnati.

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