  We present resistivity, magnetization and specific heat measurements on flux
grown single crystals of NiBi3. We find typical behavior of a type-II
superconductor, with, however, a sizable magnetic signal in the superconducting
phase. There is a hysteretic magnetization characteristic of a ferromagnetic
compound. By following the magnetization as a function of temperature, we find
a drop at temperatures corresponding to the Curie temperature of ferromagnetic
amorphous Ni. Thus, we assign the magnetism in NiBi$_3$ crystals to amorphous
Ni impurities.
