Protesters have broken through security lines and entered the venue of the COP30 UN climate talks in Belem, Brazil.
BBC journalists saw UN security staff running behind a line of Brazilian soldiers shouting at delegates to immediately leave the venue.
Videos posted online showed people storming the COP30 entrance with placards.
The Brazilian government told the BBC that the protesters appeared to be from indigenous and political groups.
Protesters crossed the first security barriers of the venue and were then prevented from getting further in, the UN told the BBC.
A security guard told the Reuters news agency he was hit in the head by a drum thrown by a protester.
The talks are hosting delegates from almost 200 countries, including senior politicians from across the world.
The talks are being held in Belém on the edge of the Amazon rainforest, which is home to dozens of indigenous groups.
Many are vocal critics of the environmental damage caused by climate change and deforestation.
