Gerardo Fernández Noroña held a map of the United States labeled "Mexico in 1830" and showed it to the reporters and photographers gathered in the lobby
The protesters blocked several lanes in the already congested historic downtown area, demanding to be allowed to work in a public park.
Rallying supporters on social media with the hashtag #SanctuaryCampus, organizers said actions were planned at more than 80 schools, including Vermont's Middlebury College and Yale University
Photos uploaded to Twitter showed hundreds of students, many of whom were carrying signs decrying the president-elect and waving Mexican flags, along with the hashtags #NotMyPresident and #BHSWalkout
Over 800 doctors and nurses accuse the hospital's director of nepotism, corruption and creating an environment of favoritism and intimidation
The protest, marked with the Twitter hashtag #MiércolesNegro (Black Wednesday), or #NiUnaMenos (Not One Less) was prompted by the rape and killing of Lucía Pérez in Argentina
After being forced out of encampment in Mexico City and Chiapas, Mexico, the CNTE teachers union's blockades and massive protests have come to an end for the time being. Union vows to continue fight.
Main Reforma avenue has been closed by the protesters.
There are 10 wounded after a driver ran over the group.
The 12-year-old had a bullet wound in the head and died at the hospital.