To search for photon produced air showers complex analysis of the Yakutsk array data of showers with energy more than 5$ \cdot $10$ ^{18} $ eV was carried out. Selection criteria were obtained based on simulations and experimental data. A number of air shower events with parameters close to those produced by primary photon were selected. These data allowed us to obtain an upper limit of integral photon flux in ultra-high energy cosmic radiation.
Multiparametric analysis of air showers with energy more than 5$ \cdot $10$ ^{18} $ eV and zenith angles more than 70 degrees did not find neutrino induced air showers.