Chile’s health ministry reported an additional 31,000 Covid-19 cases Wednesday that had not previously been counted after the government discovered a backlog of positive test results dating back to March.

The ministry also reported 4,757 newly confirmed cases Wednesday, bringing the country’s total to 220,628.

Authorities have tightened lockdown measures in the greater Santiago area, the country’s capital with more than 6 million residents.

Residents will only be allowed out of their homes twice a week now, down from the previous five, and only under strict conditions.

People found violating quarantine measures can now face up to five years in prison for doing so.

Chile also reported an additional 232 deaths on Wednesday, raising the country’s total to 3,615.