The assault occurred at a house on Prospect Bay Road in Prospect, just outside of Halifax, around 9 p.m. AT.
Police arrested two girls 1½ hours later on Mumford Road in Halifax. They remain in custody.
One of the suspects faces a charge of attempted murder.
The victim and the suspects knew each other, police said.
The RCMP General Investigation Section has been called in to help with the case.Suggest a correction