The incident happened Saturday night on Lansdowne Avenue, near Dupont Street.
Sgt. John Thibodeau told CBC News on Sunday afternoon that two males got into a dispute on the street.
One of those males was stabbed and suffered non-life-threatening injuries, which included a collapsed lung and lacerations on the face.
Thibodeau said police are seeking a suspect, but they are currently not releasing any information about him.