An electrician stepped forward on Friday, claiming to be the valiant hero seen on camera trying to fend off two rioters who were attacking a bus during Sunday night's Little India fracas.
Police officers were alerted on Friday to an object thought to be the missing arm of the decapitated body found floating in Whampoa River a day earlier.
Police on Friday arrested a 21-year-old man believed to be involved in a series of armed robbery at convenience stores in the last week.
Those heading to Little India this weekend will not be able to buy alcohol or drink it in public areas, with the police instituting the move after last Sunday's incident.
A man believed to be the "hero" during Sunday's riot was spotted in Little India on Friday evening.