Waterloo Regional Police said they are investigating an incident from the weekend that sent a local high school student to hospital.
It follows a large fight that broke out outside a house party in Waterloo late Saturday and the victim's family says he was badly beaten.
Family Facebook posts showed graphic photos of a teen's injuries.
Those Facebook posts say the 16-year-old attends Bluevale Collegiate and said he was kicked repeatedly in the head.
His family has since pulled the pictures down and has added a fresh post that says four people involved have been charged.
Reports said a number of Bluevale football team members were at the party.
The high school has posted a statement online saying it is alleged that the "violent altercation occurred involving a group of youth, some of which are Bluevale collegiate students."
Principal Deborah Tyrrell said the school is aware of the incident and is working with regional police as they investigate.
Police say there are no remaining suspects at large in connection to this incident and say it was not a random act, and the people involved knew each other.
The investigation is ongoing and are asking any witnesses to contact Waterloo Regional Police North Division at 519-570-9777 ext. 6399 or Crime Stoppers at 1-800-222-TIPS (8477).