The acceleration and radiation of solar energetic particles (electrons and ions) interacting with multiple small-scale dissipation regions resulting from the magnetic energy release process, mimicked by a cellular automaton model, is presented. Each burst of magnetic energy release is associated with a reconnecting current sheet (RCS) in which the particles are accelerated by a direct electric field. We calculate the distribution functions of the kinetic energy of the particles and the X-ray spectra and gamma-ray fluxes produced by them. Finally we compare our results with the existing observations.