Brazilian President Jair Bolsonaro has ruled out accepting a G7 offer of aid to fight fires in the Amazon rainforest unless he gets an apology from his French counterpart, Emmanuel Macron.
According to the BBC, Mr Bolsonaro said the French leader should apologise for insulting him personally by calling him a liar.
Last week, Mr Macron reportedly accused Mr Bolsonaro of lying to him at a G20 summit in Japan in June, by failing to respect his climate commitments and by failing to pursue biodiversity.
Earlier as well, Brazilian ministers said the G7 money was not needed as they accused foreign powers of wanting control of the Amazon.
Satellite data show a record number of fires burning in Brazil, most of them in the Amazon region.
As the largest rainforest in the world, the Amazon is a vital carbon store that slows down the pace of global warming.