The outbreak at karaoke or KTV lounges and bars had led the city state to tighten some restrictions on social gatherings just a week after easing them.
Of Sunday’s cases, 23 belong to the KTV cluster and 37 are linked to the Jurong Fishery Port cluster, the health ministry said in its preliminary report.
As a precaution, authorities on Sunday shut fresh fish and seafood stalls in markets as it tested stallholders for Covid-19.
Thailand expands restrictions
The country reported 11,397 infections and 101 deaths on Sunday, bringing the cumulative total to 403,386 cases and 3,341 fatalities, the vast majority from an outbreak since early April that is being fuelled by the highly transmissible Alpha and Delta Covid-19 variants.
Shopping malls will be closed and a 9pm to 4am curfew will be imposed from Tuesday onwards in Chonburi, Ayutthaya and Chachoengsao provinces, an announcement on the official Royal Gazette on Sunday showed.
The government earlier said it was planning to introduce more restrictions on movement as the surging number of cases, which continue to rise despite the partial lockdowns in high risk areas, had stretched health care capacity and health officials warned that the severe outbreak could continue for months.