Hundreds of climate activists barricaded themselves into a Paris shopping centre as security forces tried to remove them, ahead of a planned series of protests around the world by the Extinction Rebellion movement.
Campaigners faced off against police and some inconvenienced shoppers as they occupied part of the Italie 2 mall in southeast Paris on Saturday.
They unfurled banners with slogans like "Burn capitalism not petrol" above restaurants and the window displays fashion boutiques.
The protest comes ahead of planned disruption to 60 cities around the world from Monday in a fortnight of civil disobedience, from Extinction Rebellion (XR), which is warning of an environmental "apocalypse".
As the centre tried to close up in the evening, security forces ordered the protesters to leave the area, activists said.
According to images broadcast on social networks, police then tried to enter the building, while protesters blocked entrances with tables and chairs.
"I am with XR to say stop this crazy system before it destroys everything," one young woman said, giving only her first name Lucie.
Other campaign groups also joined in with the Paris shopping centre demonstration, including some members of the "yellow vest" anti-government protest group.
Non-violent protests are chiefly planned by XR from Monday in Europe, North America, Australia, but events are also set to take place in India, Buenos Aires, Cape Town and Wellington.
Another protest was held in Berlin on Saturday, with campaigners setting up camp near the parliament building.
"To governments of the world: we declared a climate and ecological emergency. You did not do enough. To everybody else: rebel," XR said on its website ahead of its International Rebellion wave of activism.
"You can't count on us or Greta to do this for you," it said, referring to teenage Swedish climate activist Greta Thunberg. "Look inside yourself and rebel."
Extinction Rebellion was established last year in Britain by academics and has become one of the world's fastest-growing environmental movements.
Campaigners want the government to declare a climate and ecological emergency, reduce greenhouse gas emissions to zero by 2025, halt biodiversity loss and be led by new "citizens' assemblies on climate and ecological justice.