Ukraine's former prime minister and leader of the Batkivschyna party Yulia Tymoshenko said she is prepared to restart work.

"I am returning to work right now. I will not lose a single minute in my effort to allow all in my homeland to feel happy," she said on Independence Square in central Kyiv on Saturday evening after arriving from Kharkiv where she had been serving her term.

"I want to tell you that I will be the guarantor for you, so no one will betray you again, and no one will step on the path the politicians usually walk," she said.

Tymoshenko apologized for all politicians, irrespective of their political party bias. "I want to say to you here today that your politicians have not been worthy of you, and I want to do all I can to bring other politicians and civil servants to the scene for you to see," the ex-prime minister said.

Tymoshenko was sitting in a wheelchair as she was addressing the Maidan audience.

Her lengthy but unspecific speech was generally welcomed, arousing varying reaction, an Interfax-Ukraine correspondent reported.

She failed to immediately establish contact with the audience, and her opening words drowned in the audience's chants: "Heroes Don't Die!"

Her call to bring President Viktor Yanukovych to account caused a wave of approval.

In the middle of the speech she was interrupted by the chants: "We don't trust you!", which were not supported, however.

But her statements about politicians were welcomed with applause.

After Tymoshenko finished her speech people started leaving the square.