Police said the fight between the two males – believed to know each other – took place in the area of Grand Vaux, St. Helier, between 14:00 and 15:00.
According to the Force, the fight is believed to have started on Grand Vaux Road outside Sutton Court and carried onto Whiteley Close, where a 17-year-old was seriously injured.
Pictured: Whiteley Close, Grand Vaux, where Police said the 17-year-old received the “serious” head injuries.
He has since been flown to Southampton Hospital where he is now receiving urgent medical treatment.
A 15-year-old has since been arrested on suspicion of ‘grave and criminal assault’ and remains in custody.
The incident is now being investigated by the Serious Crime Unit, and Police are urging anyone who saw what happened or has more information to contact call 612200 or make an anonymous report via the Crimestoppers website.
