A woman who was knocked down by advancing St. Louis Police Department officers during a Friday night protest has been charged with "interfering."

The incident was captured on multiple videos, and has since gone viral.

"Woman knocked down during demonstration shown in FOX 2's video failed to obey officers' orders and was charged with 'Interfering,'" the St. Louis Metropolitan Police Department Department tweeted on Saturday.

The woman, who appears to be an elderly white woman, has yet to be identified. The video shows she appears to be part of widespread protests in the St. Louis area after Jason Stockley, a white police officer, was found not guilty on Friday in the 2011 shooting death of Anthony Lamar Smith, a black male.

More than 20 were arrested on Friday night, and police said 10 officers had sustained minor injuries.

Despite the unrest and scattered reports of property damage, the protests remained mostly peaceful.

Activists pledged for weeks if Stockley was found not guilty, they would protest.