Nine people have spent the night in custody after a 15-year-old boy was stabbed to death in Melbourne on Tuesday night.
The boy was approached by a group of eight to 10 men on Tuesday afternoon at Brimbank Shopping Centre in Deer Park and died at the scene.
The group ran away, but six were arrested on nearby Billingham Road a short time later. They are yet to be charged.
Witnesses told Nine News the group were carrying knives up their sleeves and stabbed the teen "multiple times" in the chest and stomach.
"He's a good kid, he goes to church. He comes from a good family, a humble family. It's just so unfortunate this has happened to him," family friend Foa Galuega said.
The brawl and subsequent stabbing is believed to have been sparked by an argument on social media, Nine reported.
Hours later, a fight broke out at the scene between about 30 people.
Footage of the second brawl posted on social media shows people running into the taped-off crime scene.
A person can be heard in the footage shouting, "I'll kill you" while bystanders yell "Stop".
Three people were arrested over the second fight.
Two boys, aged 15 and 17, were released pending summons for assault-related offences, while another 15-year-old boy was interviewed by police and then released.
A police officer was taken to hospital with minor injuries and another man was treated for a cut to the head.
Homicide detectives are investigating.
