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MADRID — Spain's central government is seeing if it can bring criminal charges against the speaker of the Catalonian parliament for letting the assembly vote for independence, it said on Friday.

People hold placards to form a giant Estelada, or Catalan separatist flag, in front of the Sant Feliu del Llobregat townhall, near Barcelona. ALBERT GEA / Reuters file

The Catalan parliament voted on Wednesday to continue with its plan to detach the wealthy north-eastern region from Spain, despite a ruling by the Spanish Constitutional Court annulling an earlier resolution to form an independent state.

Related: Catalonia Votes in Symbolic Poll for Independence From Spain

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Soraya Saenz de Santamaria, deputy prime minister in the caretaker administration in Madrid, said the government had asked the Constitutional Court to annul the latest resolution and see if Catalan assembly speaker Carme Forcadell had broken the law by trying to press ahead with the independence plans.

A poll published last week showed support for Catalan independence growing at a time when political deadlock at the national level after two inconclusive general elections has prevented the formation of a new government in Madrid.

The survey, by the regional government's official pollster, found 47.7 percent of Catalans supported independence, with 42.4 against.

Related: Spain Asks Court to Declare Catalonia Independence Vote Illegal

The separatist movement in Catalonia, a region that accounts for almost a fifth of Spanish economic output and has its own language, surged during Spain's economic crisis when it drew 1 million people onto the streets of Barcelona.