Police have released two men they were interviewing in connection with the death of David Cassai, who died in hospital on Monday following a brawl in a Victorian seaside town.
A 20-year-old Kilsyth man and a 22-year-old Yarra Junction man were arrested earlier tonight but have since been released without charge, pending further inquiries.
David Cassai was killed after being punched during an altercation at Rye.
Police said investigators still want to speak to anyone who may have witnessed the incident and have urged anyone with information to come forward.
Cassai was a "great kid" whose life was taken away for no reason, his uncle says.
Police say the Templestowe lanscaper 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," Detective Inspector Potter said.
The sisters of David Cassai have posted new tributes to their brother on social media, thanking those that have offered the family support.
Both Luisa and Elisa Cassai uploaded new tributes to their brother, who died on Monday afternoon.
Luisa described as Mr Cassai as her “superstar” and “idol”.
“Our family is so lucky to have such amazing friends, family and strangers support,” she wrote on Facebook.
Elisa Cassai described her brother as a kind and caring joker who “brought a smile to everyones faces”.
Luisa Cassai’s post, created on Tuesday morning, has already received more than 160 likes.
With Chris Hingston, AAP