Adria Alsina, an organizer of the demonstrations, said protesters intend to keep up the pressure until all prisoners are released.
Over 40,000 Catalans have heeded the call by civilian groups to protest the arrest of 14 activists, including high-ranking regional officials. They are gathered in front of a regional court to show their disapproval of the detainments and reiterate their quest for independence from Spain.
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The detainments were authorized by Madrid in an effort to deter the Oct. 1 referendum vote to determine if the autonomous province of Catalonia will separate from Spain and become its own sovereign nation.
Adria Alsina, a leader of the demonstrations, said protesters intend to keep up the pressure until all prisoners are released.
Although no major incidents are being reported, three Spanish Civil Guard vehicles, the same kind that carried out several of the arrests of sovereignty activists, have been damaged amid demonstrations.
Altercations broke out in Barcelona and other Catalan cities on the eve of the arrests.
In related developments, Catalonia has invested some US$21 million to beef up its regional tax agency, according to Reuters. This is part and parcel of the autonomous region's bid for independence.
“In a future transition, it would not be acceptable for them (Madrid) to keep our taxes, because they are ours and they keep a lot," Catalan Treasury Secretary Josep Lluis Salvado said.
The tax agency increase, which includes an expansion of personnel by 75 percent, signals one of Catalonia's most palpable institutional investments for a people on the brink of attaining their independence.
Carlos Puigdemont, Catalonia's pro-independence president, has said the autonomous region's independence referendum is a moment for his compatriots to “express our will as a people, remembering the past, where we come from, but also to project ourselves into the future.”
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He added that the push to become a sovereign nation is “a future that we have in our hands and that we will democratically decide really soon."
Catalonia’s regional government has vowed to declare independence from Spain within 48 hours if the “yes” vote wins.
Countering Catalonia's bold step is Spain's conservative government headed by Prime Minister Mariano Rajoy, who insists that actions taken by the autonomous community are in direct violation of the nation's constitution. He has vowed that “there will not be a referendum.”
Located in the northeast of the country, Catalonia is recognized as one of Spain's most prosperous regions, not only economically but culturally. Residents have also been able to maintain their national language, Catalan. Apart from these aspects, which have historically fed into the independence movement, residents of Barcelona say they pay exorbitant taxes to Madrid and don't receive their worth back in services.