04 September 1997,
In all three hotels in Havana explosives were fired. Although that summer there were more extreme right-wing attacks on the interests of the Cuban Government, they caused the first death: Fabio Dichelmo, Italian entrepreneur.
Following the attack was the anti-Castro opposition and the CIA, trying to overthrow Fidel Castro.
Source:
Maurice Lemoine, “Five Cubans in ‘Front Page’” (Le Monde Diplomatique en español, November 2010)