Earlier on Monday, three of the suspects were charged with rioting while armed with a deadly weapon. They are Mervyn Veryl Daud, 28, Balakrishna Subramaniam, 32, and Sijesh Asogan, 25.
Weapons including two pen knives and a bread knife were believed to be used in the incident and were seized by the police.
“All persons are believed to be known to one another, and the fight had broken out due to a dispute,” according to the police.
Police investigations against the remaining two men and one woman, aged between 22 and 26, are ongoing, police said on Monday night.
Those convicted of murder face the death penalty.
If convicted of the offence of rioting while armed with a deadly weapon, a person can be jailed for up to 10 years and caned. If convicted of voluntarily causing hurt with a dangerous weapon, a person faces a jail term of up to seven years, a fine, caning, or any combination of such punishments.