Search for $\phi^{--}$ pentaquark in COMPASS

We report the results of the $\Xi^{-}\pi^{\pm}$ and $\bar{\Xi}^{+}\pi^{\pm}$ mass distribution studies performed on the COMPASS data taken in 2002 and 2003. The studies were triggered by the NA49 experiment observation of the exotic $\phi^{--}$ state at the $\Xi^{-}\pi^{-}$ invariant mass of 1860 MeV and width $<$20 MeV. COMPASS data analysis does not confirm the existence of this state.