A bitter row over fossil fuels has broken out at the COP30 UN climate talks in Belém, Brazil, as the meeting formally runs over time.
At the heart of the row is a disagreement over how strong a deal should be on working to reduce the world's use of fossil fuels, whose emissions are by far the largest contributor to climate change.
The dispute pits groups of countries against each other, but all 194 parties must agree in order to pass a deal at the two-week summit.
Representatives and observers from inside a guarded negotiating room say the talks have become very difficult.
One negotiator inside the room told the BBC that there is a lot of fighting. The talks were meant to finish at 1800 local time (2100GMT) and will now spill into overtime. However, the cruise ships that many delegations are staying on due to lack of accommodation in Belém depart the city on Saturday, piling on the pressure.
Brazil's President Luiz Inácio Lula da Silva and some countries including the UK want the summit to commit nations to stronger, faster action to reduce their use of fossil fuels.
It would advance a deal made two years ago, at COP28 in Dubai, that committed countries to transition away from fossil fuels. A first draft of an agreement in Brazil offered three options including timeframes, but the latest version has no mention of fossil fuels.
French Environment Minister Monique Barbut said the deal was being blocked by oil-producing countries - Russia, India, Saudi Arabia, but joined by many emerging countries. She added: As it stands now, we have nothing left. The BBC has approached Saudi Arabia for comment.
Speaking to journalists outside the negotiating room, Secretary of State for Energy Security and Net Zero Ed Miliband said the UK was determined to keep alive at the talks a plan to take further action on fossil fuels.
It's hard, it's sweaty, it's frustrating. There's a big divergence of views, he said.
Mr Miliband emphasized the importance of an innovative idea, backed by over 80 countries, to have a roadmap to transition away from fossil fuels during this COP. He asserted that people in 10-20 years will reflect on whether we took action against the looming climate crisis.
Some developing countries have yet to support the deal on fossil fuels, looking for richer nations to fulfill promises to provide climate finance to help them cope and adapt to the effects of climate change. Aisha Moriana, head of Pakistan's delegation, highlighted the need for adaptation financing, questioning who would cover the costs.
Amid these negotiations, groups of campaigners are actively protesting, voicing their demands to halt fossil fuel usage and protect the Amazon. International Youth Climate Movement campaigner Shurabe Mercado emphasized the urgency for action from the current generation facing the climate crisis. The tension in negotiations underscores the delicate diplomatic balance of addressing climate change while managing national interests.
