nairobi administrators close kenya old university tuesday cite fear students safety plan protest police beat campus demonstration last week kenyan police frequently face accusations brutality extrajudicial kill civilians right group officer rarely charge almost never convict despite kenya economic transport hub east africa key western ally volatile region receive substantial financial support security service international donors include unite state britain right group say least 28 people kill mostly police unrest follow aug. election whose result late nullify supreme court due irregularities re-run presidential vote schedule oct. 26 conduct police closely watch sept. 28 university nairobi students protest arrest opposition lawmaker police respond enter dormitories classrooms drag students beat club fire tear gas accord reuters witness university say 27 students injure police spokesman respond request comment presidential spokesman tell local radio monday robbers hide among students tuesday students plan demonstrate beat instead administrators shut university university nairobi senate decide send students home safety john orindi university corporate affairs director tell reuters tuesday morning riot policemen stand near truck water cannon outside campus gate 20-year-old veterinary student want name fear retribution say students want vice chancellor resign allow anti-riot police enter campus seriously injure students university officials talk monday interior minister police chief head kenyan government watchdog charge investigate complaints police university nairobi close anger rise police brutality