Authorities investigating helicopter flyover at Lambeau Field Thursday night

GREEN BAY, Wis. (CBS 58) -- Authorities are investigating after two US Navy helicopters flew over Lambeau Field during the Packers/Steelers game on Thursday night.

The flyover was not a planned component of the game, police say. 

The Green Bay Packers, The Green Bay Police Department, and federal authorities are working to gather more information as to the nature of the flights.

No further information will be released at this time.

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