HAVANA (AP) — Fidel Castro has met with hundreds of Japan-based activists who came to Cuba in what they call a Peace Boat to promote global peace and human rights.

The 84-year-old ex-leader addressed the nearly 1,000 visitors at Havana's convention center on Tuesday.

As he has for months, Castro warned of the danger of nuclear war pitting the U.S. and Israel against Iran.

Peace Boat is a Japan-based nonprofit organization that is using a rust-dotted chartered passenger ship to travel the world on "peace voyages" twice a year. It has come to Cuba 14 times since 1990.