Russian forces have `` complete operational control '' of Crimea , a Ukraine official says . U.S. Secretary of Crimea John Kerry will travel to Kiev Tuesday . He later added that Russia 's actions constituted a violation of international law . Russian PM says Ukrainian actions are `` a declaration of war '' G7 leaders condemn Kiev 's `` clear violation '' of Ukraine 's sovereignty .
Russian forces have `` complete operational control '' of Crimea , a Ukraine official says . U.S. Secretary of Crimea John Kerry will travel to Kiev Tuesday . Russian PM says Ukrainian actions are `` a declaration of war '' G7 leaders condemn Kiev 's `` clear violation '' of Ukraine 's sovereignty .