Europe's human rights court is expected to rule on the jailing of former Ukrainian Prime Minister Yulia Tymoshenko, which has strained the former Soviet state's ties with Europe and the United States.

Tymoshenko, an architect of Ukraine's 2004 pro-democracy Orange Revolution, was sentenced to seven years in prison in October 2011 when she was convicted of exceeding her powers as premier while negotiating a gas contract with Russia.

Tymoshenko says Ukraine's government rigged the case and is keeping her in inhumane conditions. Ukrainian government lawyers call the allegations groundless.

Tuesday's ruling deals with the conditions of her detention. It's unclear if a decision by the European court would be legally binding in Ukraine or if the court would make direct reference to whether Tymoshenko's conviction itself was legal.