But Juan Maria Uriarte, the bishop of San Sebastian, encouraged voters to show “courage” and not be “afraid” to exercise their right to vote.
Earlier on Saturday, Carrusco’s daughter Sandra appealed to voters to turn out in large numbers on Sunday to honour her father.
“Those who want to show solidarity with my father and our pain should turn out and vote on Sunday to tell the assailants that we are going to win,” she said.
Jose Luis Rodriguez Zapatero, the Spanish prime minister, accused the Eta of killing Carrasco in order to “interfere” with the election.
Zapatero came to power in a surprise election victory in 2004 amid the shock of commuter train bombings in Madrid that killed 191 people three days before his poll victory.