The 17-year-old was on his break from working at the Show's 'Break Dance' ride on Monday evening when he became involved in a confrontation about 8pm.
Two groups of males, who police believe could be from rival postcode gangs in Sydney's west, are suspected to be behind the brawl.
Uati was from Doonside, which has the postcode 2767, and friends have told police the people behind his death were from Mt Druitt, with the postcode 2770, the Daily Telegraph reported.
