  We show that a $\Xi ^{\ast}$ pole can be dynamically generated near the
$\bar{K} \Sigma$ threshold as an $s$-wave $\bar{K} \Sigma$ molecular state in a
coupled-channels unitary approach with the leading-order chiral interaction.
This $\Xi ^{\ast}$ state can be identified with the $\Xi (1690)$ resonance with
$J^{P} = 1/2^{-}$. We find that the experimental $\bar{K}^{0} \Lambda$ and
$K^{-} \Sigma ^{+}$ mass spectra are qualitatively reproduced with the $\Xi
^{\ast}$ state. Moreover we theoretically investigate properties of the
dynamically generated $\Xi ^{\ast}$ state.
