Officers would like to speak to anyone who was in Bridge Street, near Newbridge Comprehensive School, at around 10.30am on Friday 10 June.
From Gwent Police:
We’re investigating a report of an assault in Bridge Street, Newbridge, at around 10.30am on Friday 10 June.
A woman, believed to be in her late teens, reportedly assaulted a 16-year-old girl to the head at a bus stop outside Newbridge Comprehensive School.
The girl sustained an injury to her face and was advised to attend hospital as a precaution.
The woman is described as white and had dark hair worn in a bun.
She was wearing a pink jacket, black and white trousers, bright pink shoes and had a backpack on.
We’re asking anyone who was in Bridge Street between 10.15am and 10.45am on Friday 10 June or those with information, including those with CCTV or dashcam footage, to contact us.
You can call us on 101 or send us a direct message, quoting log reference 2200193872, with details.
Alternatively, you can contact Crimestoppers anonymously on 0800 555 111.