FKU IK-3 (Russian: ФКУ ИК-3)[nb 1] of the Federal Penitentiary Service of Russia for the Yamalo-Nenets Autonomous Okrug,[3] also known as Polar Wolf (Russian: Полярный волк, romanized: Polyarnyy volk) or Yamskaya Troika (Ямская тройка), is a men's maximum security corrective colony in the town of Kharp in the Priuralsky District in the Yamalo-Nenets Autonomous Okrug.

From 1966 to July 1970, the convicts worked in quarries, loading sand and gravel for filling the railway track.

Since June 2008, it has been known as "FGU IK-3 Federal Penitentiary Service of Russia for the Yamal-Nenets Autonomous Okrug" (ФБУ ИК-3 УФСИН России по ЯНАО, FKU IK-3 UFSIN Rossii po YANAO).

On 21 February 2024, the UK government placed sanctions on six individuals in charge of the prison at the time of Alexei Navalny's death.

[1] On 23 February 2024, the US government placed sanctions on three individuals: Colonel Vadim Konstantinovich Kalinin, warden of Penal Colony IK-3; Igor Borisovich Rakitin, Yamalo-Nenets regional head of the Federal Penitentiary Service of Russia; and Valeriy Gennadevich Boyarinev, Deputy Director of the Federal Penitentiary Service of Russia, who had oversight of Penal Colony IK-3 at the time of Alexei Navalny's death.

[9] Prominent Russian opposition figure and political prisoner Alexei Navalny spent up to 27 nights in a punishment cell with no access to the outside world.

[9] According to prisoners, Polar Wolf was "a system devised to break the human spirit, by making survival depend on total and unconditional obedience to the will of guards".