TAIPEI (Reuters) - The US official who heads the body that handles unofficial ties with Taiwan on Tuesday decried Nauru's "unfortunate" decision to break ties with Taipei shortly after an election and warned Beijing's promises often go unfulfilled.
The Pacific, where tiny Nauru is located, has become a source of intense competition for influence between Washington which has traditionally viewed it as its backyard, and Beijing, which has targeted Taiwanese diplomatic allies there.
China claims Taiwan as its own territory with no right to state-to-state ties, a position Taiwan strongly disputes.
US officials have previously expressed concern at China whittling away at Taiwan's allies, especially in Central America. After Nauru ended ties with Taiwan on Monday, just two days after a presidential election in Taiwan, the island is left with only 12 countries that formally recognise it.
Laura Rosenberger, chair of the Virginia-based American Institute in Taiwan (AIT), told reporters in Taipei that Nauru's move was "unfortunate" and the United States encourages all countries to expand engagement with Taiwan.
"While the government of Nauru's action is a sovereign decision, it is nonetheless a disappointing one," she said.
"The PRC often makes promises in exchange for diplomatic relations that ultimately remain unfulfilled," Rosenberger added, referring to the People's Republic of China.
The United States switched diplomatic recognition from Taipei to Beijing in 1979, but is Taiwan's most important international backer and a major arms supplier.
Taiwan's government has said China specifically chose the timing just after Saturday's presidential election to move on Nauru.
Taiwan's ruling Democratic Progressive Party's (DPP) Lai Ching-te won the election, as expected, and will take office on May 20. In the poll's run-up, China had repeatedly called him a dangerous separatist.
Unusually, Nauru's statement mentioned United Nations Resolution 2758, passed in 1971 and which saw the Beijing government take Taipei's place at the UN's China seat, as a reason for its decision.
Rosenberger said the resolution was being misinterpreted.
"UN Resolution 2758 did not make a determination on the status of Taiwan, does not preclude countries from having diplomatic relationships with Taiwan and does not preclude Taiwan's meaningful participation in the UN system," she said.
"It is disappointing to see distorted narratives about UN Resolution 2758 being used as a tool to pressure Taiwan, limit its voice on the international stage and limit its diplomatic relationships."
In the Pacific, only Palau, Tuvalu and the Marshall Islands now have official diplomatic relations with Taiwan.
Rosenberger said she expected US efforts to increase and expand engagement with Pacific Island nations to continue.