Origin Of The High Energy Cosmic Neutrino Background
  The diffuse background of very high energy extra-terrestrial neutrinos recently discovered with IceCube is compatible with that expected from cosmic ray interactions in the Galactic interstellar medium plus that expected from hadronic interactions near source and in the intergalactic medium of the cosmic rays which have been accelerated by the jets that produce gamma ray bursts (GRBs). 
Shlomo Dado and Arnon Dar
astro-ph.HE