Opposition leader and former heavyweight boxing champion Vitali Klitschko will run for the presidency , his press secretary Oksana Zinovyeva told CNN . NEW : Vitali Klitschko `` is trying to find a pretext '' to intervene , member of parliament says . Opposition leader Vitali Klitschko says he will run for president . Acting President Vitali Klitschko delays appointing an interim unity government until the weekend . Russian foreign minister warns EU not to try to turn Russia against Ukraine .
NEW : Vitali Klitschko `` is trying to find a pretext '' to intervene , member of parliament says . Opposition leader Vitali Klitschko says he will run for president . Acting President Vitali Klitschko delays appointing an interim unity government until the weekend . Russian foreign minister warns EU not to try to turn Russia against Ukraine .