Two people were arrested on suspicion of terrorism offenses in Spain's northwestern Basque Country, police said on Sunday.
A 34-year-old man and a woman, 22, who are both Spanish but who have not been named, are under investigation after a police search on September 26.
"Among the items seized was information concerning security forces, as well as the potential location of a site containing materials - presumably weapons and explosives," said a statement from the Ertzaintza, the Basque regional police.
Police did not say if the suspects were held in custody. Both will appear before Spain's National Court at a later date.
This is a developing story.