Page "Tlatelolco massacre" Paragraph 28

Video evidence also points out that at least two companies of the Olympia Battalion hid themselves in the nearby apartment buildings-including setting up a machine gun in an apartment on the Molino del Rey Building, where a sister-in-law of then-Secretary of State Luis Echeverría lived -, the church of Santiago de Tlatelolco, where snipers were positioned into the roof ; the nearby convent and the Foreign Relations Tower, where there were many people involved including-but not limited to-the ones who fired the first two flares, a machine gun on the 19th floor and a video camera on the 17th floor.

Interestingly enough, video evidence shows 10 white-gloved men leaving the church and bumping into soldiers, who point their weapons at them.

One of the men shows what appears to be an ID and they are let go.