  We consider a finitely generated torsion free Kleinian group $H$ and a random
walk on $H$ with respect to a symmetric nondegenerate probability measure $\mu$
with finite support. When $H$ is geometrically infinite without parabolics or
when $H$ is Gromov hyperbolic with parabolics, we prove that the
Patterson-Sullivan measure is singular with respect to the harmonic measure
coming from $\mu$.
