The COP29 climate summit ran into overtime on Friday, after a draft deal that proposed developed nations take the lead in providing $250 billion in annual climate finance by 2035 drew criticism from all sides.

UN climate talks looked set to overrun into the weekend as a deep gulf formed between richer and poorer countries over cash to help those most vulnerable in a warming world. Wealthier nations offered to more than double to $250bn a year the cash they give developing countries annually to fight climate change.

The COP29 UN climate summit released a first draft deal Thursday which puts at least $1 trillion of financing on the table, yet key details on where that money will come from still need to be ironed out.

The United Nations climate body published on Thursday fresh options for the COP29 summit's primary goal of agreeing how much money richer countries should provide poorer ones to help them tackle climate change.