KIEV, December 30 - RAPSI. Former Ukrainian Prime Minister Yulia Tymoshenko, who was sentenced to seven years in prison, has been transferred from the pre-trial detention center to prison, Igor Andrushko, assistant head of the Ukrainian penitentiary service told RIA Novosti on Friday.

"Tymoshenko has been already transferred from the pre-trial detention center," Andrushko said.

A Kiev district court sanctioned Tymoshenko's arrest under the second case during the December 8 on-site session at the pre-trial detention center Meanwhile, the former Ukrainian prime minister has been already been in custody since August.

A Kiev district court sentenced Tymoshenko on October 11 to seven years in prison for abuse of power in signing gas contracts between Ukraine's Naftogaz and Russia's Gazprom in 2009.

Under the new case, Tymoshenko stands indicted for tax evasion, non-disclosure of currency proceeds and attempted embezzlement of millions of U.S. dollars in budget funds.

Tymoshenko's defense says the Wednesday judgment of the appellate court is final.

The opposition is now determined to challenge the court of appeals' ruling at the European Court of Human Rights.