Philippine President Rodrigo Duterte said Thursday he would send ex-leader Fidel Ramos to China for talks after an international tribunal ruled against Beijing's claims to most of the disputed South China Sea. Duterte asked former president Ramos "go to China to start the talks" with Beijing after the UN-backed tribunal's ruling on the strategically vital waters, though he did not specify a timeframe. "War... is not an option. So what is the other side? Peaceful talks. I cannot give you the wherewithals now," Duterte said at a college alumni meeting that was also attended by Ramos. "I have to consult many people, including president Ramos. I would like to respectfully ask him to go to China and start the talks." Duterte's remarks came after a UN-backed international tribunal on Tuesday ruled against China's claim to most of the South China Sea in what is widely seen as a diplomatic victory for the Philippines. However the decision has also raised tensions with China refusing to recognise it and warning its rivals that too much pressure on the issue could turn the resource-rich waterway into a "cradle of war". Ramos, who served as president from 1992 to 1998, is known to favour close ties with China. But the 88-year-old hinted he might not accept the offer, citing his age and other commitments. Aides have said Duterte is now open to bilateral talks with China, suggesting the Philippines is in better position to negotiate following the Hague-based tribunal's decision. The Philippines had initially refrained from asking China to abide by the verdict -- in line with Duterte's directive to achieve a "soft landing" with Beijing on the issue. Duterte, who took office on June 30, has said he wants better relations with China and to attract Chinese investment for major infrastructure projects. China claims almost all of the resource-rich South China Sea, even over territory also claimed by the Philippines as well as Brunei, Malaysia, Taiwan and Vietnam.