  We have detected sub-TeV gamma-ray emission from the direction of the
Galactic Center (GC) using the CANGAROO-II Imaging Atmospheric Cherenkov
Telescope (IACT). We detected a statistically signicant excess at energies
greater than 250GeV. The flux was one order of magnitude lower than that of
Crab at 1 TeV with a soft spectrum E^{-4.6+-0.5}. The signal centroid is
consistent with the GC direction and the observed prole is consistent with a
point-like source. Our data suggests that the GeV source 3EG J1746-2851 is
identical with this TeV source and we study the combined spectra to determine
the possible origin of the gamma-ray emission. We also obtain an upper limit on
the cold dark-matter density in the Galactic halo.
