From the NIKFI-R emulsions exposed to 50 GeV/ c π − beam, 82 events of hammer tracks (HTs) are collected. Energy spectra, total number of heavy prongs ( N h) versus average energy spectra and forward to backward ratio ( F B ) in different cases are studied. The angular distribution of the events is found anisotropic. The process of jet formation affects the direction of emission of the intermediate mass nuclei.