While some of her fellow activists left of their own accord after being warned by police, many, including Thunberg, were picked up by officers and dragged away from the scene.
As the Guardian reports, Thunberg and her fellow protestors first congregated in front of the Riksdag on Monday but disbanded in the evening.
They reconvened Tuesday morning and continued blocking the door while holding up signs and calling out elected officials for their perceived inaction in the fight against climate change.
"Right now we are a group of young people who are blocking entrances to the Swedish parliament, the Riksdag, to protest against the ongoing destruction of our life-supporting systems and people who are already being killed as a result of the climate crisis that needs to come to an end," a keffiyeh-clad Thunberg told reporters. "We've had enough."
She went on to suggest that the environmentalist movement's calls have been "met with deaf ears" over the decades, adding that as a result, they feel they have "no other choice but to try different methods" to get their point across.
In the afternoon, police finally stepped in and removed the lot of them.
Footage shows Thunberg being hoisted up by two officers before being dragged away from the entrance. There were no reports of arrests.
This is far from the first time the activist has been forcibly removed from a protest. Last year police stepped in and guided her away from events in Sweden, Norway, Germany, and England.
In the case of the latter, she was detained and charged with a public order offense, however a judge recently acquitted her, ruling that the police lacked the authority to arrest her then.
