The three clusters were found in dormitories in Jurong and Tuas South.
There were 2258 new COVID-19 cases reported on Wednesday (Sep 29), said the Ministry of Health (MOH).
It is the second day in a row that Singapore reported a new daily high. Of the new COVID-19 cases, 600 are aged between 12 and 39.
Tuas South Dormitory, Kian Teck Hostel and Kian Teck Dormitoryhave been identified as new clusters, with 22, 49 and 60 cases respectively.
MOH said there were intra-dormitory transmission amongst residents with no evidence of spread to the local community for all three clusters. There is also no evidence of the infection spreading beyond the dormitory residents.
MOH is also closely monitoring 12 active clusters, including Avery Lodge and Man Fatt Lam Elderly Joy Daycare Centre.
There were eight COVID-19 related deaths reported on Wednesday, bringing the national death toll to 93. There are now 38 deaths in September, a new monthly record.
Five were males and three were female. They were all aged between 72 and 90. Six were unvaccinated, one was partially vaccinated and the remaining fatality was fully vaccinated.
All of them had unspecified underlying medical conditions.
There were also 10 imported cases who were either placed on Stay-Home Notice or in isolation upon arrival in Singapore.
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