Liam Woodards, 24, of Stratford, east London, was stabbed after a fight broke out between a group of men at Westfield in Stratford on Friday afternoon. Two suffered minor injuries during the attack, which happened in a busy area of the shopping centre called the Street.
Five men, aged between 20 and 23, were arrested. Police said one, aged 23, had been cautioned for affray and released with no further action. The others remain in custody.