Homicide Squad detectives are investigating after two males were fatally stabbed in Cobblebank this evening.
Emergency services were called to Marble Drive just before 8pm following reports a person was seriously injured.
On arrival a 12-year-old male was located with critical injuries and CPR was commenced but he has died at the scene.
A short time later police responded to reports of a male located seriously injured nearby on Cobble Street.
Treatment was given to the 15-year-old male, but he also died at the scene.
The exact circumstances surrounding the deaths are still being determined but are believed to be connected.
At this time police are treating it as a targeted attack and the investigation remains ongoing.
Anyone with information is urged to contact Crime Stoppers on 1800 333 000 or submit an online confidential report at www.crimestoppersvic.com.au