  Using 121.4 fb^{-1} of data collected with the Belle detector at the Y(5S)
resonance at the KEKB asymmetric-energy e^+e^- collider, we report evidence for
the B_s^0 -> Lambda_c^+ Lambda-bar pi^- decay mode with a measured branching
fraction (3.6 +- 1.1[stat.] {+0.3 -0.5}[syst.] +- 0.9[Lambda_c^+] +-
0.7[N_{Bs}]) * 10^{-4} and a significance of 4.4 standard deviations. This is
the first evidence for a baryonic B_s^0 decay.
