Catalans began voting Sunday in a banned independence referendum, while police seized the ballots of at least one polling station. Spain's Constitutional Court suspended the vote and the Spanish central government says the vote is illegal.
In Photos: Catalonia Independence Referendum

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Catalan President Carles Puigdemont, center, speaks to the media at a sports center, assigned to be a polling station by the Catalan government in Sant Julia de Ramis, near Girona, Oct. 1, 2017.

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Spanish riot police removes fences as they prevent people from reaching a school assigned to be a polling station by the Catalan government in Barcelona, Oct. 1, 2017.

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Spanish Civil Guard officers break through a polling station for the banned independence referendum where Catalan President Carles Puigdemont was supposed to vote in Sant Julia de Ramis, Oct. 1, 2017.

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Demonstrators wave Spanish flags during a demonstration in favor of a unified Spain on the day of a banned independence referendum in Catalonia, in Madrid, Oct. 1, 2017.