"Young people are leading the way and showing the world how we should react to this," Thunberg, 21, said, wrapped in a keffiyeh, the traditional scarf.
Local police would not comment on individual cases but said everyone who tried to block roads was detained.
Thunberg was one of dozens of people arrested in October outside a London hotel where the Energy Intelligence Forum was hosting oil and gas industry leaders.
"The final outcome of #COP28 is not a 'historic win,'" Thunberg tweeted. "It is yet another example of extremely vague and watered-down texts full of loopholes" that won't solve the problem.
On the 75th International Human Rights Day, climate change representatives from 25 organizations united to advocate for human rights and social justice for those held captive in Gaza.
Before this incident, Thunberg had yielded some of her speaking time to Palestinian and Afghan women, both sharing their experiences, the reports said.
It is the rhetorical question that should be asked of Greta Thunberg along with United Nations Secretary-General Antonio Guterres.
Movers and shakers in Israeli society.
"Do you support decapitating babies? Do you support the raping of girls? Because that's what it means to support Hamas."
More than 100 signatures were included in an open letter sent to Thunberg, and several activists also responded to her directly on X.