The method of scaling transformations permitting to carry out the reconstruction of cross sections of γN and γγ interactions on the basis of cross sections of nucleon-(anti)nucleon interactions is suggested. The photon-hadron scaling violation is a consequence of dependence of scaling transformation parametern(s) on the energy. The universal functionn(s) is interpreted as the multiplicity of photohadronization. This function is established by processing the data on γp cross sections in the low energy region √ s < 20 GeV and is extrapolated to the high energy region up to √ s ∼ 200 GeV. The results of the reconstruction of γN cross sections at high energies and of γγ ones at all energies are in a remarkable agreement with available experimental data.

The results of searching for neutrino events from the blazar PKS 0735+17 at the Baksan Underground Scintillation Telescope (BUST) are presented. A neutrino from the PKS 0735+17 region was detected at BUST on December 4, 2021, during a strong outburst of this object, coinciding with an observed Fermi LAT gamma-ray outburst. The BUST neutrino event preceded the detections of high-energy neutrino events from the PKS 0735+17 region by IceCube, Baikal-GVD, and KM3NeT.