Two shopping centres and a market were yesterday added to the Ministry of Health's (MOH) list of places visited by Covid-19 cases while they were infectious.

A confirmed case visited Tampines Mall last Tuesday while infectious between 2.45pm and 3.25pm, while another visited Mustafa Centre last Thursday between 3pm and 4pm.

Mustafa was allowed to reopen its supermarket section on May 6. It was closed for more than a month after it was identified as a Covid-19 cluster in April, and was also linked to multiple dormitory clusters.

The ministry said a confirmed case had visited Geylang Serai Market and Food Centre on May 26 from 9am to 10.30am. The full list of places is on MOH's website.

While there is no need to avoid these places, those who have gone there should monitor their health closely for 14 days from the date they visited, said MOH. They should visit a doctor promptly if they develop fever, respiratory symptoms, or loss of taste or smell.

MOH also confirmed another 383 Covid-19 cases yesterday, taking Singapore's total to 37,910.

Ten of the new cases are Singaporeans and permanent residents, four are work or student pass holders, and 369 are migrant workers staying in dormitories.

There were no imported cases, and 96 per cent of the new cases are linked to known clusters.

Proactive screening picked up 11 cases in the community. Of these, six were as a result of proactive testing of school staff and students above the age of 12, who were diagnosed with acute respiratory infection when they first saw a doctor.

Five are from the following schools: Anglican High School, CHIJ Katong Convent, CHIJ St Theresa's Convent, Geylang Methodist Secondary School and Hwa Chong Institution.

MOH said epidemiological evidence suggests the cases were likely to have been infected during the circuit breaker period, and not after schools started to reopen from last Tuesday.

The Education Ministry said the five comprised four students and one non-teaching employee, and added that they are not a cluster as they were from different schools.

The sixth case is a student from Ascensia International School.

MOH confirmed a new cluster in a dormitory at 6 Tuas South Street 2.

A cluster at Northpoint City, a mall in Yishun, and another in a dormitory at 133 Tuas View Square were closed after no new cases were linked to them for two incubation periods of the virus, or 28 days.

The daily average for new community cases has increased to eight in the past week from four the week before, said the ministry.

Across the same period, the number of unlinked cases has remained stable at an average of four a day.

Another 327 patients were discharged yesterday, bringing the total number of patients who have recovered to 24,877.

Currently, 295 patients are still in hospital, with three in critical condition in the intensive care unit. Another 12,704 are isolated and cared for at community facilities, which are for those with mild symptoms or who are clinically well but still test positive for Covid-19.

Singapore has seen 25 deaths from Covid-19. Nine who have tested positive have died of other causes.