International audience; Using a data sample of 980 fb-1 collected with the Belle detector operating at the KEKB asymmetric-energy e+e- collider, we present evidence for the Ω(2012)- in the resonant substructure of Ωc0→π+(K¯Ξ)- ((K¯Ξ)-=K-Ξ0+K¯0Ξ-) decays. The significance of the Ω(2012)- signal is 4.2σ after considering the systematic uncertainties. The ratio of the branching fraction of Ωc0→π+Ω(2012)-→π+(K¯Ξ)- relative to that of Ωc0→π+Ω- is calculated to be 0.220±0.059(stat.)±0.035(syst.). The individual ratios of the branching fractions of the two isospin modes are also determined and found to be B(Ωc0→π+Ω(2012)-)×B(Ω(2012)-→K-Ξ0)/B(Ωc0→π+K-Ξ0)=(9.6±3.2(stat.) ±1.8(syst.))% and B(Ωc0→π+Ω(2012)-)×B(Ω(2012)-→K¯0Ξ-)/B(Ωc0→π+K¯0Ξ-)=(5.5±2.8(stat.) ±0.7(syst.))%.