  Recently the Fermi-LAT data have revealed two gamma-ray emitting
bubble-shaped structures at the Galactic center. If the observed gamma rays
have hadronic origin (collisions of accelerated protons), the bubbles must emit
high energy neutrinos as well. This new, Galactic, neutrino flux should trace
the gamma ray emission in spectrum and spatial extent. Its highest energy part,
above 20-50 TeV, is observable at a kilometer scale detector in the northern
hemisphere, such as the planned KM3NeT, while interesting constraints on it
could be obtained by the IceCube Neutrino Observatory at the South pole. The
detection or exclusion of neutrinos from the Fermi bubbles will discriminate
between hadronic and leptonic models, thus bringing unique information on the
still mysterious origin of these objects and on the time scale of their
formation.
