Tunisia begins week of strict coronavirus measures
Prime Minister Hichem Mechichi said Friday that Tunisia was going through "the worst health crisis in its history" and that health facilities were at risk of collapse.
Until next Sunday, mosques, markets and non-essential shops must close, gatherings and family or cultural celebrations are banned, and people are forbidden from travelling between regions.
An overnight curfew begins at 7:00 pm (1800 GMT) instead of 10 pm, and is in force until 5 am.
Schools have been closed since mid-April.
Shops along Tunis's central Habib Bourguiba Avenue and in the old city were all closed on Sunday, an AFP correspondent said.
But videos shared on social media appeared to show almost-normal activity in several other parts of the country, including people without masks and failing to respect social distancing.
The Eid al-Fitr holidays that mark the end of Ramadan are traditionally a time when Muslim families and friends gather together.
This year, the holiday is expected to begin on Thursday.
Tunisia, a country of almost 12 million, has officially recorded more than 319,000 coronavirus cases and 11,350 deaths.
Over 500 people are currently in intensive care, a level previously unseen in the North African country.
The country has set up field hospitals to deal with the influx of patients.
It is also struggling to meet its oxygen needs, and has appealed for assistance from European countries and even neighbouring Algeria, struggling with its own health crisis.
A vaccination campaign launched in mid-March, a month later than planned, is moving more slowly than anticipated.
"The number of patients in hospitals has almost doubled in just a month," said Amen-Allah Messadi, a doctor on the country's Covid-19 scientific taskforce.
He added that oxygen consumption had "multiplied by four or six".
"The situation is very serious," he said.