  Recently IceCube collaboration has reported first evidence for the
astrophysical neutrinos. Observation corresponds to the total astrophysical
neutrino flux of the order of $3 \cdot 10^{-8}$ $GeV/cm^2/s/sr$ in a PeV energy
range. Active Galactic Nuclei (AGN) are natural candidate sources for such
neutrinos. To model the neutrino creation in AGNs we study photopion production
processes on the radiation field of the Shakura-Sunyaev accretion disks in the
black hole vicinity. We show that this model can explain detected neutrino flux
and avoids, at the same time, existing constraints from the gamma-ray and
cosmic ray observations.
