From West Midlands Police:
Police were alerted to a sexual assault which took place around 4.15pm on Wednesday 25 January on Swinford Road, Selly Oak.
A woman was walking her dog in the alleyway when she was approached by a schoolboy who engaged her in conversation. He is then believed to have touched the woman inappropriately before walking away.
This is believed to be a random incident and officers are not linking it to other recent reports in the area.
Anyone with information or who saw any suspicious behaviour can contact police on 101.