London rail services. Reuters/Peter Nicholls
Climate change activists disrupted rail services in the east of London on Thursday, with pictures on social media showing protesters sat on trains during the morning commute.
British Transport Police said they had responded to incidents at Shadwell, Stratford and Canning Town, near to London's Canary Wharf financial district.
"Arrests have already been made and officers are working to quickly resume services," the police said in a statement.
