Emergency services were dispatched to the JobCentre Plus on Bristol Road South, at around 11AM this morning, after being called by staff.
On arrival, they found a teenager who had suffered a stab wound to the buttocks and leg. He was taken to hospital where he remains this afternoon – His condition is not believed to be life threatening.
Police immediately launched an investigation and four teenagers were arrested in nearby Longbridge Town Centre.
Officers will be carrying out reassurance patrols in the area and CCTV footage is being examined to help with the investigation.
Please call WMP on 101 if you have ANY information.