The protests came after the Spanish Supreme Court detained five Catalan separatist leaders, including Catalan presidential candidate Jordi Turull. In total 25 people, the core of the movement, have been indicted over last year's independence drive.
Lawyers for the two officials have lodged requests with the High Court to be released, saying they had not shown any resistance to the Spanish Prime Minister's decision to instigate direct rule over Catalonia.
Over 800 people were injured when Spanish police cracked down on vote on independence from Spain. After the close of polls, Catalan regional President Carles Puigdemont says Catalonia has "won the right to become an independent state."
Spain's Constitutional Court suspended the referendum law to allow judges time to consider whether the Catalan vote for an independence reference breaches the country's constitution.
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