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MEXICO CITY, MEXICO - NOVEMBER 16: UNAM students shout slogans during a protest around the university campus demanding respect for the autonomy of the institution on November 16, 2014 in Mexico City, Mexico. Yesterday, the judicial police entered the university premises and in an unexplained incident, fired at some students injuring the leg of one of them. Hundreds of riot police arrived at the college where minor clashes were reported. (Photo by Miguel Tovar/LatinContent/Getty Images)

MEXICO CITY, MEXICO - NOVEMBER 16:   UNAM students shout slogans during a protest around the university campus demanding respect for the autonomy of the institution on November 16, 2014 in Mexico City, Mexico. Yesterday, the judicial police entered the university premises and in an unexplained incident, fired at some students injuring the leg of one of them. Hundreds of riot police arrived at the college where minor clashes were reported. (Photo by Miguel Tovar/LatinContent/Getty Images)