The Tlatelolco Massacre, also known as The Night of Tlatelolco (from a book title by the Mexican writer Elena Poniatowska), took place on the afternoon and night of October 2, 1968, in the Plaza de las Tres Culturas in the Tlatelolco section of Mexico City, ten days before the 1968 Summer Olympics celebrations in Mexico City. The death toll remains controversial: some estimates place the number of deaths in the thousands, but most sources report between 200 and 300 deaths. Government sources say "4 Dead, 20 Wounded". The exact number of people who were arrested is also controversial.
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