Global climate change talks in Durban have been suspended on the last day after a number of delegations including the European Union complained the current draft lacked ambition.
Activists gathered for the largest protest so far outside the 194-nation conference.
Leading the demonstration was the Executive director of Greenpeace Kumi Naidoo, who was led away by security.
He said their aim was to inject some urgency into the talks, which after two weeks were supposed to have reached some kind of agreement today.
Connie Hedegaard, the European union’s climate commissioner said she feared there would be no deal in Durban.
The protracted talks frustrated delegates from small islands and African states who joined a protest by green groups outside.