A teenager was taken to hospital with "potentially serious injuries" in an attack said to have been launched by students from a different school.
The victim, a pupil at Ark Kings Academy in Kings Norton in Birmingham, was beaten up outside school grounds on Monday afternoon, Monday 30 January.
A teenager was found injured and he was assessed by ambulance staff before being taken to hospital for further treatment.
A West Midlands Ambulance spokesperson said: "We were called at 3.37pm to reports of an incident at ARK Kings Academy on Shannon Road, Birmingham.
"One ambulance and a paramedic officer were sent to the scene where, on arrival, they discovered a teenage boy with potentially serious injuries.
"He was assessed by ambulance staff and taken to hospital for further treatment."
In a statement, a spokesperson from Ark Kings Academy, said: "One of our students was assaulted by pupils from another school yesterday afternoon.
"The incident took place just outside the school after the end of the school day. Staff were nearby and immediately intervened by calling the emergency services."The student received medical attention and was discharged from the hospital yesterday evening. He is at home with his family."The school takes any incident like this very seriously. We informed all school parents of the incident yesterday evening and updated them again this morning, asking for any further information or footage that could assist with the police investigation.
"We have been in contact with the family this morning."