China and India have agreed to resume trade ties and move towards resolving their longstanding border dispute.

Nikki Haley has cautioned that ties between Washington and New Delhi are near a breaking point, and said it was critical to get the relations back on track if America hopes to contain China's growing global ambitions.

The US's tariff deadline for China, which was scheduled to end on August 12, was extended by President Donald Trump by 90 days earlier this month.