Masked young men drag material to build a barricade near Mexico's National University, UNAM, in Mexico City, Sunday, Nov. 16, 2014 (Photo: AP)
A police officer moves a garbage bin used as a barricade near Mexico's National University, UNAM, in Mexico City, Sunday, Nov. 16, 2014 (Photo: AP)
Masked young men run, as a group of people attacks a bank office near Mexico's National University, UNAM, in Mexico City, Sunday, Nov. 16, 2014 (Photo: AP)
A student with her face covered looks over her shoulder as she marches inside Mexico's National University, UNAM, campus in Mexico City, Sunday, Nov. 16, 2014 (Photo: AP)
Masked students put a plastic shelf into the fire during a protest in support of a fellow student who was shot in the leg and against the violation of the autonomy of the National Autonomous University of Mexico (UNAM) by police forces, outside the campus in Mexico City November 16, 2014 (Photo: Reuters)
A policeman asks a colleague to stop using the fire extinguisher after masked students set garbage on fire during a student protest in support of a fellow student who was shot in the leg, and against the violation of the autonomy of the National Autonomous University of Mexico (UNAM) by police forces, outside the campus in Mexico City November 16, 2014 (Photo: Reuters)
Students take part in a protest in support of a fellow student who was shot in the leg and against the violation of the autonomy of the National Autonomous University of Mexico (UNAM) by police forces, at the university campus in Mexico City November 16, 2014 (Photo: Reuters)
In this Nov. 11, 2014 photo, teachers march around a vehicle they flipped during clashes with riot police in Chilpancingo, the capital of Guerrero state, Mexico (Photo: AP)
Masked students walk past a burning barricade during a protest in support of a fellow student who was shot in the leg and against the violation of the autonomy of the National Autonomous University of Mexico (UNAM) by police forces, outside the campus in Mexico City November 16, 2014 (Photo: Reuters)
A masked young man runs as a group of persons attacks a bank office near Mexico's National University UNAM in Mexico City, Sunday, Nov. 16, 2014 (Photo: AP)
Masked men burn a barricade near Mexico's National University UNAM in Mexico City, Sunday, Nov. 16, 2014 (Photo: AP)