Transport links in east London have been disrupted after violent clashes broke out Thursday morning between Extinction Rebellion activists and commuters.
A dramatic footage showed commuters dragging an activist from the roof of a London Underground train.
"Arrests have already been made and officers are working to quickly resume services," the police said in a statement.
Extinction Rebellion launched a wave of protests on October 7 to highlight the risks posed by climate change.

Belarus frees Nobel winner, protest figures as US lifts more sanctions
Indonesia flood death toll exceeds 1,000
Ukraine's Odesa suffers major blackouts after Russian attack
Two killed in Ukrainian drone strike on Russia's Saratov
Thailand continues Cambodia strikes despite Trump's ceasefire claim
