Empty hotel rooms, idle tour boats and shuttered travel agencies reveal widening fissures in the tiny Pacific nation of Palau, which is caught in an escalating diplomatic tug-of-war between China and Taiwan.

Late last year, China effectively banned tour groups to the idyllic tropical archipelago, branding it an illegal destination due to its lack of diplomatic status.

As China extends its influence across the Pacific, Palau is one of Taipei's 18 remaining allies worldwide and is under pressure to switch allegiances, officials and business people there say.