  The hadronic decays eta -> pi pi pi, eta-prime -> pi pi pi and eta-prime ->
eta pi pi are investigated within a U(3) chiral unitary approach. Final state
interactions are included by deriving the effective s-wave potentials for meson
meson scattering from the chiral effective Lagrangian and iterating them in a
Bethe-Salpeter equation. With only a small set of parameters we are able to
explain both rates and spectral shapes of these decays.
