  BES data on $J/\psi \to \gamma (K^{\pm} K_S^0 \pi^{\mp})$ are presented.
There is a strong peak due to $\eta(1440)/\iota$, which is fitted with a
Breit-Wigner amplitude with $s$-dependent widths for decays to $K^*K$, $\kappa
K$, $\eta \pi\pi$ and $\rho\rho$; $\kappa$ refers to the $K\pi$ S-wave. At a
$K\bar{K}\pi$ mass of $\sim 2040$ MeV, there is a second peak with width $\sim
400$ MeV; $J^P = 0^-$ is preferred over $1^+$ and $2^-$ respectively by 5.2 and
6.8 standard deviations. It is a possible candidate for a $0^-$ $s\bar sg$
hybrid partner of $\pi(1800)$.
