Mass protests in Kiev, Ukraine against Tymoshenko trialMrs Tymoshenko's trial has polarised public opinion in Ukraine
The demonstrations were dispersed after a stand-off with police in riot gear.
Mrs Tymoshenko is charged with abuse of office. Her supporters see the trial as a political prosecution designed to stop her running in future elections.
Some Western governments, including the United States, have also expressed concern that the case against Mrs Tymoshenko is politically motivated.