Police in Peterlee are investigating after a series of incidents were reported around the William Brown Medical Centre off Manor Way in the town centre.
Durham Constabulary has said this has included youths climbing on the roof and becoming threatening towards those who work there and patients who use the service.
On one occasion, the troublemakers tried to steal items from the surgery while a worker from the practice gave treatment to one of the youths for a bloodied nose.
Now parents are being urged to ensure they know where their child is, with a warning they could be removed from the surgery’s register if their youngster is found to be involved in the antisocial behaviour.
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A spokesperson for Peterlee Neighbourhood Policing Team said: “Police are now in possession of CCTV images which clearly show the people involved and are working to identify those responsible.
“You can expect a knock on the door in the very near future if you have been involved.
“Please be aware that if your child has been involved then the centre may look to remove them and potentially parents from patient lists as this type of behaviour is totally unacceptable.”
Anyone with information about the incidents is asked to contact police on 101 or Crimestoppers anonymously on 0800 555 111.