  We discovered an unprecedented magnitude of the 1/f noise near the Curie
temperature Tc in low-Tc manganites. The scaling behavior of the 1/f noise and
the resistance provides strong evidence of the percolation nature of the
ferromagnetic transition in the polycrystalline samples. The step-like changes
of the resistance with temperature, observed for single crystals, suggest that
the size of the ferromagnetic domains depends on the size of crystallites.
