Marcos Barber
Marcos Barber is a pseudonymous figure linked to a recent wave of threats against educational institutions in Uruguay, where he claimed to be part of an online group named '764' and announced intentions to commit a mass shooting at the University of the Republic, alarming authorities and prompting heightened security measures.
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Argentina:
Marcos Barber is the sender of a threatening message claiming to be part of a group planning a massacre at a university.
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