<prompt> tafadhali geuza maudhui haya ya swahili kwenda kwa kiingereza.kukamatwa kwa kiongozi huyo wa upinzani kunafuatia maandamano yaliyofanyika jana jumapili kupinga rushwa na ambayo ni makubwa tangu yale ya mwaka 20112012 na yamefanyika ikiwa ni mwaka mmoja kabla ya kuitishwa uchaguzi wa rais ambao rais wa sasa vladimir putin anatarajiwa kuwania tena nafasi hiyo ukiwa ni muhula wake wanne.  <response>: worldrussian police detain opposition leader, hundreds of protestersthe protests, reckoned to be the biggest since a wave of anti-kremlin demonstrations in 20112012, come a year before a presidential election that vladimir putin is expected to contest, running for what would be a fourth term. 