The United States and European Union condemned the use of force used by Ukrainian police against protesters who took to the streets of Kiev in November. Demonstrations broke out after the Ukrainian government suspended efforts to sign free trade and association agreements with the European Union.
"The democratic world is now looking at the Ukrainian authorities differently, their use of violence and other illegal methods to try to quash the peaceful protest movement in Ukraine," Tymoshenko said.
She's the daughter of former Ukrainian Prime Minister Yulia Tymoshenko, jailed for abusing her authority when she helped broker a Russian natural gas deal in 2009. The former prime minister lost a bruising campaign for president to Viktor Yanukovych and says her prison sentence was politically motivated.
The Yanukovych administration said the November decision was made to protect economic ties with Russia. Ukraine is a former Soviet republic.
The younger Tymoshenko said Ukrainian authorities are at risk from sanctions for their use of force.
"I think this is a sensitive issue for the government," she said in statements published on the former prime minister's website.