Singapore recorded 447 new coronavirus cases on Wednesday — the largest single-day increase since the outbreak began in the country, the Ministry of Health said in a statement.

The new cases bring the country’s total number of reported cases to 3,699.

Among the new cases, 404 have been linked to known clusters, of which the vast majority are foreign workers residing in dormitories, the ministry said.

In the same news statement, the ministry said the average number of new daily cases has increased significantly “from 48 cases per day last week, to 260 cases per day in the past week.”

Last week, Singapore announced it would move foreign workers into alternative living arrangements such as military camps and vacant government apartments amid a spike in cases.