Protesters blocked the entrance to the Louvre in Paris on Monday, as French authorities scrambled to stem public discontent fuelling mass cost-of-living demonstrations that over the weekend spilled over into some of the worst street violence in recent years.

President Emmanuel Macron ordered a security review as the country’s interior minister admitted that the police “had lost control” during the weekend’s unrest.

Undeterred, the Yellow Vests movement, which organised the weekend’s rallies, called for a new round of protests Saturday.

Italy, Spain and Portugal, where anger over rising prices has also led to protests, were keeping a nervous eye on the developments after smaller clashes broke out in Milan over the weekend and protests about housing costs persisted in Spanish cities.

Some half a million people turned out across France to protest the surging cost of living, a culmination of four weeks of protests that began with high school students demanding better conditions at their schools.

What started as peaceful demonstrations morphed into violence in some places, as masked groups on the sidelines of the protests attacked law enforcement, broke into town halls and other public buildings, setting many of them ablaze, looted shops, and set fire to cars, bicycles and scooters on the streets.

Interior Minister Laurent Nunez offered to resign on Monday after more than 2,500 people were arrested and nearly 1,000 members of the security forces were injured. Protesters were also hurt, with one demonstrator’s hand blown off by a police crowd-control grenade.

“On Saturday, in some major cities, you couldn’t look shopkeepers in the eye after hundreds of shops had been looted and tell them we hadn’t lost control,” Nunez said.