Madrid has entered a strict lockdown despite a legal challenge from the regional government, after cases of coronavirus jumped in the Spanish capital.
The new rules, which ban people from leaving or entering the city and nine other areas in metropolitan Madrid without good reason, came into force on Friday night following an order from the central government.
The new restrictions affect around 6.6 million people and are set to last for two weeks.
Regional president Isabel Diaz Ayuso challenged the decision in the country's Constitutional Court on Friday, demanding that it be put on hold until a final ruling could be made.
The conservative leader, who said the region's virus numbers have improved in recent days, accused the socialist Prime Minister Pedro Sanchez of waging a political war against her and said he was illegally interfering in the region's affairs.
On Friday, Ayuso's Justice and Interior Minister Enrique Lopez said the new restrictions would not only unleash "chaos, uncertainty and unrest" but would also cause a loss in income of 2 billion euros per week.
The new regulations from the central government will apply to any city of more than 100,000 people which records more than 500 cases in 14 days, where more than 10 per cent of coronavirus tests are positive and where more than 35 per cent of intensive care beds are filled by COVID-19 patients.
The Madrid area recorded 647 cases per 100,000 people over the past two weeks, with 234 cases per 100,000 people over the past week.