Two police officers were injured and three people were arrested after clashes during a far-right rally.
The English Defence League (EDL) staged a protest in the centre of Worcester against plans to build a mosque in the city.
A number of other groups held counter demonstrations on Saturday afternoon.
Footage shared online sees a female police liaison officer brought to the ground during a scuffle in Broad Street.
She is seen lying face down on the ground before being helped up by another officer and a member of the public.
West Mercia Police said two officers were injured, "but thankfully neither is thought to be seriously hurt".
Superintendent Damian Pettit thanked the public for their "co-operation and patience" during the event and said a "small minority of people were more confrontational in their attitude than we wanted".
Officers are also investigating reports of "items being thrown into the EDLgroup.