Countries in Southeast Asia had until recently taken for granted a stable relationship between China and the US to preserve their own prosperity.

Top G20 finance officials have agreed that there was an urgent need to find a global system to tax internet giants like Google and Facebook but clashed on the best way to do it.

Ukrainian President Petro Poroshenko warned of the threat of "full-scale war" and said Russia had sharply increased its military presence on their shared border as tensions escalate between the ex-Soviet neighbours.

European leaders vow to defend the landmark Paris climate pact at a G20 summit next week, setting them on collision course with US President Donald Trump at what is expected to be a stormy meeting.