UPDATE 1-Climate-change protesters disrupt London rail services

Climate change activists disrupted rail services in the east of London early on Thursday, sparking a physical confrontation between angry commuters and a protester who had climbed onto the roof of a London Underground train, video on social media showed.

British Transport Police said they had responded to incidents at Shadwell, Stratford and Canning Town, near to London's Canary Wharf financial district. Footage showed protesters unfurling an Extinction Rebellion protest group banner on top of a stationary London Underground train at Canning Town before one was pelted with food and physically dragged off by commuters.

"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 civil disobedience on Oct. 7 to highlight the risks posed by climate change and the accelerating loss of plant and animal species.

Police in London said on Wednesday they had arrested 1,642 people since the protests started.