MEXICO CITY (AP) — Raul Alvarez Garin, a leader in the 1968 student uprising that culminated in the massacre of protesters in Mexico City, has died at age 73.

Alvarez Garin died Friday in the capital after a yearlong battle with cancer, according to a Facebook statement posted by the Committee of the ’68 Pro Democratic Liberties. He founded the group to demand punishment for those responsible for the massacre.