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In page Mexican Movement of 1968:

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The Polytechnic students held their campuses against the army for more than twelve hours, which aroused strong opposition by the government. The French journal L'Express stated that 15 people died in the battles and that more than one thousand bullets were fired; the government reported three dead and 45 injured people.[3] Students from the Santo Tomás campus who were arrested in the occupations later said that they had been concentrated for defense in the entry lobbies. The military shot students at random and some of their friends did not survive.[citation needed]