BARCELONA, Spain (AP) — Catalonia's vice president says more than six out of ten voters are expected to cast ballots during the region's independence referendum despite the Spanish government's aggressive efforts to stop the vote.

Oriol Junqueras said Friday that Catalan citizens will be able to vote on Sunday "even if somebody takes voting stations by assault and tries to avoid something as natural as placing a voting slip in a ballot."

Spain's Constitution says that only the nation's government can call a referendum on sovereignty. Police forces acting on judges' orders have seized ballots and arrested regional officials in an unprecedented crackdown.

Junqueras says an internal poll showed that more than 60 percent of the 5.3 million eligible voters plan to cast ballots.

He displayed a prototype of the plastic ballot boxes planned for more than 2,300 voting stations.