Police responded to reports of a fight at an apartment building on Eva Road — near Burnhamthorpe Road and The West Mall in the west-end neighourhood of Etobicoke — at around 1:15 a.m. ET Friday.
They smashed through the glass door at the building's entrance to get to the 12th-floor apartment, and found the boy with cuts and bruises.
He was transported by ambulance to the Hospital for Sick Children, where he remained in critical condition on Saturday.
The lawyer of the mother, who cannot be named to protect the identity of the victim, asked to have religious jewelry taken to her son at the hospital.
Neighbours say the boy lived in the apartment with his mother, an older sister and a younger brother.