Wyndham Crime Investigation Unit detectives arrested nine men following an affray and stabbing in Hoppers Crossing on Saturday morning (Nov. 26).
Emergency services were called to Mossfiel Drive where a man was located with injuries about 3.40am.
The 23-year-old man was taken to hospital with life-threatening injuries and remains in a critical but stable condition. Nine men were arrested at the scene.
They were all in custody and were to be interviewed by detectives.
Police are also investigating an incident where another man self-presented at a hospital in Werribee with suspected stab wounds about 4am.
The 16-year-old boy arrived at hospital with serious injuries in a black Mazda CX9.
It is unclear at this stage where the second stabbing occurred.
Investigations are ongoing into the circumstances of both incidents, which police believe are targeted at this stage.
Detectives are working to establish whether the two incidents are linked.