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We report a search for charmless hadronic decays of charged $B$ mesons to thefinal states $K^{0}_{S} K^{0}_{S} K^{\pm}$ and $K^{0}_{S} K^{0}_{S} \pi^{\pm}$. The results are based on a $711 {fb}^{-1}$ data sample that contains $772\times 10^6$ $B \bar{B}$ pairs, and was collected at the $\Upsilon(4S)$resonance with the Belle detector at the KEKB asymmetric-energy $e^{+}e^{-}$collider. For $B^{\pm} \to K^{0}_{S} K^{0}_{S} K^{\pm}$ decays, the measuredbranching fraction and direct $CP$ asymmetry are $[10.64\pm0.49(stat)\pm0.44(syst)]\times10^{-6}$ and [$-0.6\pm3.9(stat)\pm 3.4(syst)$] %,respectively. In the absence of a statistically significant signal for$B^{\pm}\to K^{0}_{S} K^{0}_{S} \pi^{\pm}$, we set the 90 % confidence-levelupper limit on its branching fraction at $1.14 \times 10^{-6}$.

Study of charmless decays $B^{\pm} \to K^{0}_{S} K^{0}_{S} h^{\pm}$ ($h=K,\pi$) at Belle