Los Angeles Police internal affairs investigators are looking into an officer’s use of a baton during a protest last week in South Los Angeles, a department spokesman said Tuesday.

Cmdr. Andrew Smith said a personnel complaint investigation was initiated after a protester showed Smith video of the incident, which occurred Dec. 1 near 65th Street and Broadway.

A video uploaded to YouTube shows three officers taking a man on the ground into custody. As some demonstrators approach, other officers holding batons step forward to keep them back.

At one point, the video shows one officer moving toward the demonstrators, swinging his baton twice at chest level before a police supervisor touches his shoulder and moves him away.

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