A 14 year old was arrested and released under investigation.
Police say a 15 year old boy from Morriston who was hurt following a large disturbance involving a group of young people is in a stable condition in hospital.
Officers were called to the area near the LC on Oystermouth Road at around 4.45pm on Saturday.
A 14 year old boy from the Sandfields area of Swansea was arrested on suspicion of a section 18 assault and released under investigation.
Anyone else with information or who witnessed the incident is asked to contact 101 quoting occurrence number *092187.