Police received a call at 6.46pm yesterday of reports of an assault on a 14-year-old girl in Ashwood Road. An Air Ambulance was also on call and arrived at the scene.
During the altercation, the victim suffered a cut to the back of her head which required hospital treatment.
A 14-year-old girl from Potters Bar has been arrested on suspicion of Grievous Bodily Harm (GBH).
She has been bailed.
•Any witnesses or anyone with information about the incident, should contact Hertfordshire Constabulary on the non-emergency number 101, quoting crime reference 41/4638/18.