The UN climate talks COP30 have been evacuated due to a fire breaking out inside the venue in Belém, Brazil.
BBC journalists saw flames and smoke in the pavilion area before they were rushed outside where fire engines raced past.
The UN said the fire was extinguished after six minutes and 13 people were treated for smoke inhalation. It is not yet known what caused the blaze.
The talks were in the final hours of trying to agree on next steps to tackle climate change but the fire has disrupted negotiations and the talks remain closed.
It was climbing the walls and onto the ceiling. People were screaming, Dr Harshita Umesh, who was giving a talk next to the area where the fire broke out, told the BBC. Then I ran, I think I tripped and fell.
Emergency medicine specialist Kimberly Humphrey, currently helping patients at the COP medical center, described the injuries as primarily related to smoke inhalation.
BBC Climate Editor Justin Rowlatt reported on the chaotic scene as UN security ordered evacuations, while columns of smoke were seen rising from the venue.
The incident is expected to delay the conclusion of the ongoing negotiations, with delegates seeking shelter and safety as Brazilian authorities took control of the situation.
The fire, which reportedly started in one of the summit's country pavilions, has raised concerns regarding safety protocols at such international climate meetings.
This year, nearly 200 countries are participating in COP30 discussions focused on urgent climate actions and commitments.
