Jailed Ukraine opposition leader Yulia Tymoshenko has arrived at a hospital in the city of Kharkiv to be treated by a German doctor, according to reports.
Eyewitnesses say Ms Tymoshenko, a former prime minister, was taken to a side entrance of the hospital in a heavily guarded convoy.
She has been on hunger strike since accusing prison guards of beating her during an earlier attempt to move her to hospital, the BBC reports.
Concern over her treatment has caused diplomatic tensions within the European Union.
Ukraine postponed a European summit on Tuesday after several leaders announced a boycott over the issue.
There is also a threat that leaders may stay away from Euro 2012 football matches in Ukraine in June.