Sen. Heberto Castillo,68, for decades a leftist opposition leader, died Saturday of complications from a heart attack in Mexico City.
Mr. Castillo, who was once jailed for his activism, was best known as an opponent of Mexico's entrenched ruling party.
Colleagues said his death may complicate efforts to reach a settlement to a smoldering rebellion by Indian peasants in the southern state of Chiapas.
They said Mr. Castillo was the moral leader to mediators.
August Heckscher,83, a former parks commissioner who helped bring the New York City Marathon andBarbra Streisand to Central Park, died Saturday in New York.
Vladimir Soloukhin,72, a Russian author who has long campaigned for the preservation of his country's national heritage and was allied with Russian hard-liners, died of cancer Friday in Moscow.
Pub Date: 4/08/97