  Recent astronomical observations reveal that Active Galactic Nuclei (AGN) are
sources of high-energy radiation. For example, the Fermi-LAT and Hess
telescopes have detected gamma-ray emissions from the cores of several types of
AGN's. Even more, the Pierre Auger observatory has found a correlation of
ultra-high energy cosmic ray events with the position of Active Galactic
Nuclei, such as Centaurus A. In this way, according to particle physics, a flux
of high-energy neutrinos should be expected from the interactions of cosmic and
gamma-rays with the ambient matter and radiation at the source. In this work,
estimations of the diffuse neutrino flux from AGN's arising from interactions
of the gamma radiation with the gas and dust of the sources will be presented.
