U.S. slams Taiwan president's planned visit to contested South China Sea island

Taiwan President Ma Ying-jeou's planned trip to the Taiwanese-held island of Itu Aba in the disputed South China Sea is "extremely unhelpful" and won't do anything to resolve disputes over the waterway, a U.S. official said on Wednesday.

But Ma's one-day visit to Itu Aba, known as Taiping in Taiwan, comes amid growing international concern over rising tensions in the waterway and quickly drew the ire of the American Institute in Taiwan (AIT), the de facto U.S. embassy in Taipei in the absence of formal diplomatic ties.

"We are disappointed that President Ma Ying-jeou plans to travel to Taiping Island," AIT spokeswoman Sonia Urbom said in an email to Reuters.

"Such an action is extremely unhelpful and does not contribute to the peaceful resolution of disputes in the South China Sea."

The United States wanted Taiwan and all claimants to lower tensions, rather than taking actions that could raise them, Urbom added.

On a visit to Beijing on Wednesday, U.S. Secretary of State John Kerry said Washington and Beijing needed to find a way to ease tensions in the South China Sea, through which $5 trillion in ship-borne trade passes every year.

Both Taiwan and China claim most of the South China Sea. Vietnam, the Philippines, Malaysia and Brunei also have competing claims.