We investigate particle collisions in non-extremal black hole that can probably induced to extremely high center of mass energy E cm . We consider the collision of two particles where first particle comes from far to the outer horizon of the Reissner-Nordström black hole and second particle emanates from the white hole region. It is exhibited that unbounded E cm requires that second particle lapse near the bifurcation point. We discuss the collision of particles close to the outer horizon in detail.