Officials at Hartsfield-Jackson Atlanta International Airport said a suspicious vibration that caused a service interruption turned out to be a toothbrush.

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The officials said a vibration was discovered in a bag checked onto an AirTran flight Friday and service in a portion of the North Terminal -- including Metropolitan Atlanta Rapid Transit Authority rail service -- was interrupted for a little more than a half-hour while an investigation was conducted, The Atlanta Journal-Constitution reported Friday.

Investigators discovered just prior to 8:30 a.m. the vibration was being caused by an electric toothbrush in the bag. Full service was soon resumed.