Const. Ciaran (KEE-run) Feenan of the Delta Police Department says the teen was arrested Saturday morning.
He says investigators arrived at the scene at about 10 p.m. Friday and found a 16-year-old girl and a 15-year-old girl suffering from stab wounds.
Feenan says the older girl was pronounced dead upon arrival at the hospital and that the 15-year-old female remains in critical condition.
Police believe the suspect and the victims knew each other.
No names have been released.