Russia sentences a Jehovah's Witness to 6 years in a penal colony. Human rights groups call the charges a farce.

Dennis Christensen, a Jehovah's Witness, is escorted at a courthouse Wednesday in Oryol, Russia.

(CNN)Human rights groups and religious freedom advocates are blasting a Russian court for sentencing a Danish Jehovah's Witness to six years in a penal colony, saying the charges of "religious extremism" are unwarranted and unjust.

On Wednesday, Dennis Christensen was found guilty of violating a Russian law banning "the organization of a public or religious association ... or prohibition of activities in connection with extremist activities," according to TASS, Russia's state-run news agency.
A district court in Oryol, in western Russia, sentenced Christensen to six years in a penal colony, according to TASS. Christensen's attorney says he will appeal the ruling.
    Christensen's sentencing is part of a campaign against Jehovah's Witnesses and other minority religions, religious freedom advocates say, as Russian Orthodox Christians seek to maintain their cultural dominance.
      In 2017, Russia's Supreme Court banned Jehovah's Witnesses as an "extremist organization." According to a spokesman for the religion, 120 Jehovah's Witnesses are facing criminal charges in Russia, with 24 in pretrial detention and 28 under house arrest.
      United Nations High Commissioner for Human Rights Michelle Bachelet said she is "deeply concerned" by Christensen's sentencing.
      "The harsh sentence imposed on Christensen creates a dangerous precedent, and effectively criminalizes the right to freedom of religion or belief for Jehovah's Witnesses in Russia," Bachelet said.
      Religious freedom advocates in the United States also expressed concern.
      "Dennis Christensen's conviction represents the continued deterioration of religious freedom in (President Vladimir) Putin's Russia," said Kristina Arriaga, vice chair of the US Commission on International Religious Freedom.
      "Evidently, it's not enough for the state to brand peaceful groups like the Jehovah's Witnesses 'extremist'; it must also imprison their members."
      Last year, the commission call