West Midlands Police are investigating an assault which took place in Kings Norton at around 2pm on Saturday (13th September)
Police were called to Teviot Grove in the Hawkesley area by ambulance personnel who were called to treat a 16 year old lad for a minor puncture wound to his leg.
Officers are investigating to establish the circumstances surrounding the assault.
Anyone who was in the area at the time or who may have witnessed the assault is urged to come forward and contact the violent crime team at Bournville on 101. Alternatively people can leave information anonymously by calling Crimestoppers the independent charity on 0800 555 111.