We report results from a study of the charmed double strange baryons Omega_c^0 and Omega_c^{*0} at Belle. The Omega_c^0 is reconstructed using the Omega_c^0 --> Omega^- pi^+ decay mode, and its mass is measured to be (2693.6 pm 0.3 {+1.8 atop -1.5})
MeV/c^2. The Omega_c^{*0} baryon is reconstructed in the Omega_c^0 gamma mode. The mass difference M_{Omega_c^{*0}} - M_{Omega_c^0} is measured to be (70.7 pm 0.9 {+0.1 atop -0.9}) MeV/c^2. The analysis is performed using 673 fb^{-1} of data on and near the Upsilon(4S) collected with the Belle detector at the KEKB asymmetric-energy e^+e^- collider.
