Male Swiss mice were injected intraperitoneally with indium ions and Se-compounds (viz. selenomethionine and SeO2). The distribution of Se, In and Zn in liver and spleen has been studied by instrumental neutron activation analysis. Se and In were incorporated in all investigated organs. The simultaneous injections with In and Se-compounds do not produce observable In–Se correlations effects. On the other hand, it was found that the simultaneous and single In injections increase the Zn-content in liver (24 h after injections), whereas no correlation effects were observed in spleen.