FORT COLLINS, Colo. (CBS4) – An internal investigation is under way after a Fort Collins police officer was caught on video shoving a man.

After the shove another officer is seen running over and arrests the man. The whole time the man was demanding to know why he was being arrested.

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The incident happened early Sunday morning in Old Town Square. Police were called out after a bike taxi driver reported someone damaged his bikes.

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Police are reviewing the incident to see if any disciplinary action is needed. They say the video shows only about one minute of a 20 minute encounter.

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Three men were cited and released.