Three radio sources (10913, 44, and 4092) are found in the COSMOS field within a massive galaxy group detected in X-ray at z ≈ 0:35. Two of them, radio galaxies 10913 and 44, have extended and interestingly shaped radio morphologies, i.e. bent jets. We analyze the radio sources and their 10’ x 10’ environment in the optical regime. Modeling the light distributions of their optical counterparts with the Sersic profile we obtain Sersic index values: 3.946 ± 0.005, 4.77 ± 0.01, and 4.37 ± 0.02 for 10913, 44, and 4092 respectively. The results of modeling suggest that the optical counterparts of radio galaxies 10913 and 44 are elliptical galaxies, possibly with a core. The light distribution in the central part of the optical counterpart of radio source 4092 follows the Sersic profile well. However, residual light in its outer parts remains and needs to be investigated further. By analyzing the spatial distribution of optical sources in the 10’ x 10’ environment of radio sources and extracting the ones in highly dense areas, we detect a large concentration of densely distributed galaxies, that spatially corresponds to the group detected in X-ray, and that has substructures. The color index of the member galaxies does not seem to affect their position within the large concentration. We find a long (≈ 6 mag), nearly horizontal, and ≈ 1 mag wide structure - likely a red sequence in the corresponding galaxy color-magnitude diagrams. Using spectroscopic instead of photometric redshift in future work, would give more precise results and possibly better-defined (narrower) sequence. The obtained results agree with the idea of the potential galaxy group being a non-relaxed system, possibly caught in the process of its creation through the merging of more than one smaller group (likely around each radio source). Additional and in some aspects, more advanced research is needed in optical as well as at other wavelengths (radio, X-rays) to further investigate this scenario.