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A study of B meson decays to two-body final states containing a K⁰ is presented. The decay B⁰ -> K^{0bar {K}^0} has been observed for the first time and an upper limit on B⁺ -> bar {K}^{0K^+} has been set. In addition, a search for the D_sJ^*(2632)⁺ state recently reported by the SELEX Collaboration at FNAL has been performed in the D_sη, D⁰K⁺ and D*⁺K_S decay modes. No signal is observed in the searched channels.