If you can find any references/details to the incident, please post. Seems I ought to remember it, but there was so much going on.
I know it's BBC but here is a recap of the incident. I know now why I remember it... my old swim coach was going down to the Mexico City Olympics as an assistant coach and was intimidated by the riots.
http://news.bbc.co.uk/onthisday/hi/dates/stories/october/2/newsid_3548000/3548680.