The boy, 17, was charged with domestic violence, aggravated burglary and obstruction.
Elyria police Capt. Chris Costantino said the girl, who lives in the apartments, opened the door after 19-year-old Stephen Carnes knocked on it, and the 17-year-old boy charged inside and attacked her with a knife.
Carnes, who is an acquaintance of the boy, was charged with contributing to the delinquency of a minor and aggravated burglary.
Costantino said the girl’s injuries were minor, and she refused medical treatment.
Contact Chelsea Miller at 329-7123 or firstname.lastname@example.org.