Federal Governmental Institution — penal colony No. 18 of the Federal Penitentiary Service of Russia in Yamalo-Nenets Autonomous Okrug, commonly known as the Polar Owl is a Russian prison located on the bank of the Sob River near the Polar Urals in the Kharp urban-type settlement. It is one of the seven supermax corrective labor colonies operated by the Federal Penitentiary Service for convicts sentenced to life imprisonment in Russia. In addition to special regimen it has sections with common and strict regimens.