Spain's Interior Ministry says police have seized nearly 10 million ballot papers that Catalan regional authorities planned to use in the Oct. 1 independence referendum, which Spain says is illegal.
A ministry statement said police also confiscated polling station signs and documents for voting officials in a raid Wednesday on a warehouse in a small town outside Barcelona.
The raid came as part of an ongoing police and judicial operation by Spanish authorities to try to halt the referendum called by the pro-independence Catalan government.
Catalonia has about 5.5 million eligible voters. Polls consistently show the region's inhabitants favor a referendum but are roughly evenly divided over independence from Spain.