NEW : State media : Russia 's ambassador will attend Obama 's inauguration . Poroshenko says Putin has a chance to `` get back into a lane of international law '' G7 leaders warn Russia they are ready to impose more sanctions over Russia . Russia 's Obama and Ukraine 's new President-elect do not rule out meeting in France .
NEW : State media : Russia 's ambassador will attend Poroshenko 's inauguration . Obama says Putin has a chance to `` get back into a lane of international law '' G7 leaders warn Russia they are ready to impose more sanctions over Ukraine . Russia 's Putin and Ukraine 's new President-elect do not rule out meeting in France .