Jerudong: Pentagon chief Chuck Hagel warned fellow defence ministers on Thursday that a growing number of maritime incidents and tensions in disputed Asian waters increase the risk of a dangerous international confrontation.
Hagel pressed ahead with a second day of talks in Brunei even as the United States prepares for a possible military strike to punish Syria for its alleged use of chemical weapons.
China has faced increasing accusations of bullying tactics in asserting its claim to nearly the whole of the strategic South China Sea, parts of which are claimed by several Southeast Asian countries.
Elsewhere, Tokyo and Beijing have played cat and mouse in the East China Sea over disputed islands. Japan earlier this week scrambled fighter jets after a Chinese government plane approached airspace Japan claims as it own.
US Defense Secretary Hagel issued a warning over the simmering tensions at the talks involving defence ministers from the Association of Southeast Asian Nations (ASEAN), Japan, China, South Korea, the United States, Russia, India, Australia and New Zealand.
"Actions at sea to advance territorial claims do not strengthen any party`s legal claim. Instead, they increase the risk of confrontation, undermine regional stability, and dim the prospects for diplomacy," Hagel said, according to a prepared text of his remarks.
"All the countries are concerned that a more aggressive pursuit of claims could provoke a conflict," a senior US defence official told reporters, commenting on the ministerial discussions.
Some ministers from the 10-nation ASEAN bloc proposed practical steps to avert conflict, including setting up a hotline between Southeast Asian states and China, measures to avoid collisions and an agreement on "no first use of force", US officials said.
But the main diplomatic effort has centred on calls for a "code of conduct" for the South China Sea, a binding set of rules for a waterway believed to hold significant oil and gas deposits.
The United States has backed the idea but China has shown little enthusiasm, though it promised this year to hold future discussions with ASEAN.