september 29 correct fix date election paragraph nairobi kenyan government watchdog say friday investigate whether police assault students protest week university nairobi detention opposition lawmaker police fire tear gas thursday protest students video footage post social media late day show uniform officer outside dormitories inside classrooms use batons hit people appear involve campus protest late crackdown police protest since aug. presidential election late annul supreme court re-run vote set oct. 26. independent police oversight authority ipoa morning note social media report incident members national police service allegedly storm university nairobi assault students institution authority say twitter fee request member public come forward provide information aid investigation students protest re-arrest lawmaker paul ongili owino wednesday shortly release bail charge subversion call president uhuru kenyatta son dog campaign rally kenya key western ally region often roil violence preparations re-run election closely monitor sign instability least 28 people kill unrest follow aug. vote ipoa watchdog create 2011 police come severe criticism number protesters kill demonstrations dispute elections 2007. violence kill around 1,2000 people local international right group say institution struggle fulfill mandate investigate allegations police brutality country rife report civilians extrajudicial kill security force ipoa secure two convictions police officer four years operational watchdog pledge last month fast-track investigations high-profile deaths baby allegedly kill police violence election l4n1l34fc people familiar status investigations say police cooperate senior officials police force interior ministry insist officer kill thieve thugs kenya watchdog say investigate police action university