While a police warning is usually issued “in place of prosecution” and indicates that an offence may have been committed, an advisory is given to those who have not committed offences, and face no further action, The Straits Times quoted Commissioner of Police Ng Joo Hee as saying.
This third group, besides the ones deported and charged, would neither be further detained nor repatriated.
They would be allowed to work and stay in Singapore but there should be no complaints against them in future, Ng said in a statement last Friday.
The advisory was given both orally and in written form to the workers.
Meanwhile, the 28 Indians charged with rioting are set to make an appearance in court tomorrow after being remanded for investigations.
The trouble started after a private bus fatally knocked down an Indian pedestrian, 33-year-old Sakthivel Kuaravelu, in Little India.
Some 400 migrant workers were involved in the rampage that left 39 police and civil defence staff injured and 25 vehicles - including 16 police cars - damaged.
Singapore previously witnessed violence on such a scale during race riots in 1969.
