Putin says 'the whole of Ukraine is ours' in theory, may take city of Sumy

ST PETERSBURG (Reuters) -President Vladimir Putin said on Friday that Russians and Ukrainians were one people, "and in that sense the whole of Ukraine is ours," and said he did not rule out Russia taking control of the Ukrainian city of Sumy. But Putin, speaking at an international economic forum in St Petersburg, said Russia had never doubted Ukraine's right to sovereignty, but noted that when Ukraine declared its independence in 1991 it was as a "neutral state".