Several demonstrators have been arrested in central Copenhagen, where clashes broke out on day five of the UN climate change summit.
The number of police drafted in for the event stands at about 5,000, but that is expected to rise next week as world leaders start to arrive.
A big demonstration calling for what organisers call a “strong and fair” climate deal is due to be held tomorrow.
Small island states today unveiled a draft deal that calls for developed nations to cut CO2 emissions by 45 percent by 2020 and provide financial aid to poor countries equivalent to up to one percent of national income.
It also aims to limit temperature rises to just 1.5 degrees celsius above pre-industrial levels – below the two degrees targeted by most major emitters.
Another draft text says the world should at least halve global greenhouse gas emissions by 2050.