IceCube experiment has detected two neutrinos with energies beween 1-10 PeV.
They might have originated from Galactic or extragalactic sources of cosmic
rays. In the present work we consider hadronic interactions of the diffuse very
high energy cosmic rays with the interstellar matter within our Galaxy to
explain the PeV neutrino events detected in IceCube. We also expect PeV gamma
ray events along with the PeV neutrino events if the observed PeV neutrinos
were produced within our Galaxy in hadronic interactions. PeV gamma rays are
unlikely to reach us from sources outside our Galaxy due to pair production
with cosmic background radiations. We suggest that in future with simultaneous
detections of PeV gamma rays and neutrinos it would be possible to distinguish
between Galactic and extragalactic origins of very high energy neutrinos.Comment: 5 pages, version to be published in Astroparticle Physic
