US Vice President Joe Biden on Friday called on Asian nations to reduce tensions in disputed waters across the region as Washington redoubles efforts to confront China's growing maritime presence there.
In a flurry of diplomacy on the first day of his two-day visit to Singapore, President Barack Obama's number two urged parties to reject bellicose threats in the South China Sea and East China Sea and "quickly" agree on rules to prevent conflict.
China claims nearly all of the strategically vital South China Sea, even waters close to the shores of its
smaller neighbours, a regular flashpoint with smaller nations like Vietnam and the Philippines.
Beijing is also locked in an increasingly fractious maritime row with Japan in the East China Sea over a series of disputed islands -- a source of growing concern for Washington which has a defence alliance with Tokyo.
As well as meeting with Singaporean leaders, Biden took the opportunity to hold talks with Japanese Prime Minister Shinzo Abe, who was visiting Singapore on the same day as part of tour of Southeast Asia.
"We each expressed our concern about the rising tensions in the South China Sea," Biden told reporters after a meeting with Singapore Prime Minister Lee Hsien Loong.
"The United States urges all parties to reject coercion, intimidation and threats to the use of force," said
Biden, who arrived late Thursday from an earlier visit to India.
"We encourage the ASEAN and China to quickly reach agreement on a code of conduct," he added.
Four members of the Association of Southeast Asian Nations -- Brunei, Malaysia, the Philippines and Vietnam -- are locked in rival claims with China and Taiwan over areas in the South China Sea.
The 10-nation grouping has been urging China to negotiate a legally binding code of conduct aimed at
preventing conflict in the sea, but Beijing has said it prefers to deal with individual claimants.
Washington says it has an interest in the freedom of navigation in the sea, which hosts vital shipping lanes.
China in recent years has increasingly taken steps to enforce its claims, sparking the strongest protests from Philippines and Vietnam.
Biden in his remarks did not refer to any particular threats to the use of force or intimidation in the South China Sea.
But in June this year, a powerful arm of China's state-run media accused the Philippines of trying to provoke Beijing and warned it could lead to aggressive Chinese action.
"If the Philippines continues to provoke China... a counterstrike will be hard to avoid," said the commentary run by the People's Daily, the mouthpiece of the ruling Communist Party.
On his meeting with Abe, Biden said both leaders shared the view that the US-Japan alliance plays a central role in regional peace and stability.