这起群殴事件发生在凌晨1点左右，地点是Roxburgh Park区的Mackellar Drive上，并导致六人因伤入院。
Police investigate after the street brawl in Roxburgh Park. Pictures: Nicole Garmston
Residents arrive home after the fight in front of their house.
Police gather evidence at the scene.
Twelve arrested after violent brawl in Mackellar Drive, Roxburgh Park
A dozen people have been arrested after a violent brawl broke out in Melbourne's north in the early hours of this morning.
The fight, which occurred in Mackellar Drive in Roxburgh Park around 1am, also left six people in hospital.
Police spokeswoman Leonie Johnson said police understand that everyone involved in the brawl knew each other.
"Police believe several people pulled up in the street in two cars and a fight ensued between some occupants of a house in the street," she said.
Both men and women were involved in the brawl and were aged between 17 to 64 years of age, Ms Johnson said.
Ambulance Victoria spokeswoman Grace Keyworth said emergency services received several of triple-0 calls about the incident.
One man was taken to the Royal Melbourne Hospital with serious head injuries. Four other men also sustained head injuries and one woman in her late teens was taken to the Austin Hospital with abdomen injuries.
A number of people remain under police guard in hospital, Ms Johnson said.
Police are investigating the incident.
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