  We report the first observation of Y(5S) -> Y(1,2S) pi0 pi0 decays. Evidence
for the Zb0(10610) with 4.9sigma significance is found in a Dalitz plot
analysis of Y(5S) -> Y(2S) pi0 pi0 decays. The results are obtained with a
121.4 fb^-1 data sample collected with the Belle detector at the Y(5S)
resonance at the KEKB asymmetric-energy e+e- collider.
