Add to ORKGPhoton angular distributions and energy spectra up to the kinematic limit have been measured in 190 MeV proton reactions with light and heavy targets. For the first time photon spectra in dependence of scattered protons have been measured to investigate the influence of the multiple-scattering process on the photon production. Based on predictions for the free pn bremsstrahlung amplitude a strong suppression of bremsstrahlung relative to a quasi-free production model is observed in the low-energy regime of the photon spectrum in p+nucleus reactions. We attribute this effect partly to modifications of the bremsstrahlung amplitude in the nuclear medium and partly to interference of proton amplitudes due to multiple scattering of nucleons.</p