Spanish police today discovered 84 kilograms of explosives in an arms cache belonging to the militant Basque separatist group ETA, dpa quoted police sources as saying. The cache was one of five in the Basque region. Their locations were revealed by ETA suspect Ibai Beobide who was arrested earlier this month. Beobide said ETA activists coordinated by him had a total of 150 kilos of explosives, according to police sources. The suspect guided police to the forested area where the 84- kilogram cache was found. Police also located another store containing eight kilos of explosives. ETA has killed more than 820 people since 1968 in its campaign for an independent Basque country.