SOCHI, Russia - The International Olympic Committee says images of the attack on the Pussy Riot punk group in Sochi are "very unsettling."

IOC spokesman Mark Adams says the governor of the Krasnodar region has apologized for the attack and is investigating.

Adams says it's a matter not directly related to the Sochi Games but he "found the pictures and the video very unsettling."

On Wednesday, Cossack militia attacked the group with horsewhips as they tried to perform under a sign advertising the Sochi Olympics.

Adams says the IOC wants to know more details but called it "largely an issue for" the Russian government.

He added that "it's a shame if the Olympics is used as a political platform" and that "we saw the strong feelings, on both sides, these things can provoke."

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  • Members of the punk group Pussy Riot, including Nadezhda Tolokonnikova in the blue balaclava and Maria Alekhina in the pink balaclava, are attacked by Cossack militia in Sochi, Russia, on Wednesday, Feb. 19, 2014. (AP Photo/Morry Gash)

  • A Russian security officer attacks Nadezhda Tolokonnikova and a photographer as she and fellow members of the punk group Pussy Riot, including Maria Alekhina, left, stage a protest performance in Sochi, Russia, on Wednesday, Feb. 19, 2014. (AP Photo/Morry Gash)

  • Members of the punk group Pussy Riot, including Nadezhda Tolokonnikova in the blue balaclava and Maria Alekhina in the pink balaclava, are attacked by Cossack militia in Sochi, Russia, on Wednesday, Feb. 19, 2014. (AP Photo/Morry Gash)

  • A member of the punk group Pussy Riot lies on the ground as the group is attacked by Cossack militia in Sochi, Russia, on Wednesday, Feb. 19, 2014. (AP Photo/Morry Gash)

  • A member of the punk group Pussy Riot is restrained by Cossack militia after the group tried to perform in Sochi, Russia, on Wednesday, Feb. 19, 2014. (AP Photo/Morry Gash)

  • A Cossack militiaman attacks Nadezhda Tolokonnikova and a photographer as she and fellow members of the punk group Pussy Riot, including Maria Alekhina, center, in the pink balaclava, stage a protest performance in Sochi, Russia, on Wednesday, Feb. 19, 2014. (AP Photo/Morry Gash)

  • A Russian security officer records members of the punk group Pussy Riot Nadezhda Tolokonnikova, right, and Maria Alekhina, center, after they were attacked by Cossack militia in Sochi, Russia, on Wednesday, Feb. 19, 2014. (AP Photo/Morry Gash)

  • A photographer is whipped by a member of the Cossack militia while trying to photograph members of the punk group Pussy Riot being attacked by Cossack militia and a Russian security officer, in Sochi, Russia, on Wednesday, Feb. 19, 2014. (AP Photo/Morry Gash)