Norwegian police on Wednesday briefly detained environmental campaigner Greta Thunberg during a demonstration in Oslo, a Reuters eyewitness said.
Indigenous campaigners and other activists demanding the removal of wind turbines from reindeer pastures in Norway in recent days blocked access to several government buildings.
Thunberg and others blocking one of the doors to the Norwegian finance ministry were lifted up by police officers and carried away from the area while fellow demonstrators chanted slogans.
Norway's supreme court in 2021 ruled that two wind farms built at Fosen in central Norway violated Sami rights under international conventions, but the turbines remain in operation more than 16 months later.