A man who died following a brawl in a Victorian seaside town was a "great kid" whose life was taken away for no reason, his uncle says.
David Cassai, 22, died after he and some mates were confronted by another group outside a pizza shop in Rye on the Mornington Peninsula about 1am (AEDT) on Monday.
Police say the Templestowe man fell after being assaulted, striking his head on a concrete footpath.
David's uncle Sandro Cassai said his death was devastating.
"They have taken the life of such a great kid," he told radio station 3AW on Tuesday.
"David was just such a gem of a kid and his life has just been taken away for no reason."
Mr Cassai said he understood his nephew and his mates were ambushed.
He said they were not looking for trouble.
"David was just a gift to us all," Mr Cassai said.
"He will be remembered forever. He was just such a great kid and he will be missed by many."
Mr Cassai called on the media and the government to work together to prevent similar incidents happening in the future.
"They just seem so minor, but they are just so devastating and so tragic," he said.
After the assault, David Cassai was flown in a critical condition to The Alfred hospital, where his family stayed by his side, but he died around 4pm on Monday.
Detective Inspector John Potter said CCTV footage captured the brawl, and clearly showed the group of five men as the aggressors.
He said police were confident they would be able to pinpoint those responsible for the violence, and urged them to turn themselves in before they were tracked down.
"Ultimately we're going to be able to identify you and it would be best if you came forward," Det Insp Potter said.