SINGAPORE, June 11 (Reuters) - Beijing will "not hesitate to start a war" if Taiwan declares independence, China's defence minister warned his US counterpart on Friday (Jun 10), the latest salvo between the superpowers over the island.

The warning came as Wei Fenghe held his first face-to-face meeting with US Defence Secretary Lloyd Austin on the sidelines of the Shangri-La Dialogue security summit in Singapore.

US-China tensions have been soaring over democratic, self-ruled Taiwan, which lives under constant threat of invasion by China. Beijing views the island as its territory and has vowed to one day seize it, by force if necessary.

Wei warned Austin that "if anyone dares to split Taiwan from China, the Chinese army will definitely not hesitate to start a war no matter the cost", defence ministry spokesman Wu Qian quoted the minister as saying during the meeting.

The Chinese minister vowed that Beijing would "smash to smithereens any 'Taiwan independence' plot and resolutely uphold the unification of the motherland", according to the Chinese defence ministry.

He "stressed that Taiwan is China's Taiwan ... Using Taiwan to contain China will never prevail", the ministry said.

Austin "reaffirmed the importance of peace and stability across the (Taiwan) Strait, opposition to unilateral changes to the status quo, and called on (China) to refrain from further destabilising actions toward Taiwan", according to the US Department of Defense.