MIDDLETOWN, Pa. (WHTM) – An incident where an unauthorized user gained access to Harrisburg International Airport's public address system could have been much worse, a security expert said.

Police at the Pennsylvania airport are investigating after someone breached the system and played a pre-recorded message Tuesday evening.

In a recording that captured the incident, a computer-generated voice reads off a list of hackers claiming responsibility for the takeover of the system........

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