Ministers from more than 190 countries have been working through the night in an effort to reach a historic deal on climate change.
Talks at the United Nations summit in Paris slipped past their Friday evening deadline as countries engaged in shuttle diplomacy in an effort to find usual ground.
Barack Obama has called a number of world leaders in recent days, including Xi Jinping, president of China, which is under pressure as one of the world's largest emitters of greenhouse gases.
It appears the final deal could see leaders agree to measures that would keep temperature increases to no more than 1.5C above pre-industrial levels. Current plans limit the temperature rises to 2.7C.
There are still obstacles, however.
The issue of "loss & damage" – recognising vulnerable countries need assist to deal with climate alter symptoms such as rising sea levels – is difficult when more developed countries don't want to leave themselves open to liability or claims of compensation.
This sticking point saw tensions rise as India's environment ministerÂ Prakash Javadekar accused the developed world of not showing flexibility towards poorer countries.
And Marshall Islands foreign minister Tony de Brum, the driving force behind the "high ambition coalition", accused some countries of trying to "gut the text" of the strong agreement he & many EU countries are seeking.
The conference's organisers are due to reveal a final draft of the agreement this morning yet some believe the talks will last for many more hours.
Source: “Sky News”