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