The 18-year-old was attacked by a man as she walked home at around 1.30pm yesterday.
The suspect – who is described as black, aged in his late teens or early 20s, of slim build and curly short black hair, with yellow, crooked teeth – tried talking to her but she ignored him as he was a stranger.
But he followed the young woman onto a footbridge, between Reede Road and Blackbourne Road, and sexually assaulted her.
He also stole her phone before she managed to fight him off.
The victim punched him in the face and it’s believed he may have a cut or bruising to his face.
At the time of the attack he was wearing a black jacket, grey hoodie, and dark trousers.
Anyone with any information, or who knows a male fitting the description of the suspect, is asked to contact police on 101 and quote CAD 3730/6Sept or tweet @MetCC.
Alternatively, to remain anonymous, call Crimestoppers on 0800 555 111.
© TIME107.5fm 2015-2019. All rights reserved.