  We present the contributions of new CP phases in CP asymmetries of two-body
neutral $B_s$ decays coming from a left--right model with spontaneous CP
violation. Large deviations from the Standard Model predictions can be
accommodated in a natural way by this type of models. The new physics effects
on the mixing, width difference and decays are analysed. In particular, we show
how the measurement of the angle $\gamma$ in electroweak penguin-dominated
processes can be largely affected.
