A poll worker lifts up a ballot box in celebration after ballots were counted at a polling station in the banned independence referendum in Tarragona, Spain, October 1, 2017. REUTERS/David Gonzalez

MADRID (Reuters) - Pro-independence groups and trade unions in Catalonia have called for a general strike in the northeastern Spanish region for Oct. 3, La Vanguardia newspaper reported citing the head of the group Omnium Cultural Jordi Cuixart.

Catalonia’s economic output is worth around a fifth of Spain’s total gross domestic product and the region has an economy around the size of that of Chile.