Lee said the first priority was to look into what caused the riot and to ensure something like that does not happen again.
He said the incident, the country's worst riot in 40 years, was a good reminder to people that even in a stable society, such incidents can still happen.
Speaking to reporters, Lee said authorities were also looking at ways to strengthen the police force by beefing up resources and employing technology such as equipping officers with wearable cameras.
Lee thanked the officers for performing their duty with courage and collectedness, and encouraged them not to heed some of the online criticism about their actions.
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The government appointed committee is investigating the riot related issues.
Singapore police also deported 52 Indian nationals and one Bangladesh national in connection with the case.