Thousands of students in Nanjing clashed with local police following alleged police brutality towards student vendors, the South China Morning Post reported. According to the Hong Kong-based Information Center for Human Rights and Democracy, five student vendors with the Nanjing University of Aeronautics were beaten by officers as they tried to remove them from the campus on Monday evening. Students demonstrators then marched from the campus, blocking main roads at the university’s north entrance. Protestors clashed with riot police and smashed a police car after three students were arrested by police. In total, 30 students were injured. This marks the second student protest in less than 10 days. On May 7, students at Zhejiang University in the eastern city of Hangzhou demonstrated after one of their classmates was killed by a speeding driver. Chinese authorities are wary of campus unrest in the runup to the 20th anniversary of the June 4 1989 student democratic protests in Tiananmen Square.