Thousands of protesters have taken to the streets after Spain's supreme court detained five separatist leaders for their role in a bid for independence last year.
The court also issued international arrest warrants for six other Catalan figures who have fled abroad, including former regional president Carles Puigdemont.
Twenty-four protesters were lightly injured in clashes with police, emergency services said.
Riot police used batons to keep the demonstrators away from the federal government offices in Barcelona.
The protest had been called on Thursday, by the radical Committees for the Defence of the Republic (CDR), before the court decisions were announced.
Spain's Supreme Court said on Friday it would prosecute 13 key Catalan separatists for "rebellion", a crime which carries a maximum penalty of 30 years in jail.
Five people were held in custody, including Catalan presidential candidate Jordi Turull who was due Saturday to seek a second round vote in the regional parliament, after failing to be elected earlier in the week.
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Spain charges exiled Puigdemont and 12 Catalan leaders with rebellion
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A Supreme Court judge held former Catalan parliament president Carme Forcadell and three former regional ministers alongside Turull.
Judge Pablo Llarena decided that the five posed a flight risk, after Marta Rovira became the latest leading pro-independence figure to flee abroad to escape charges.
Rovira ignored the summons and announced she was taking "the road to exile".
The deputy leader of the leftwing separatist ERC party, whose chief is currently in jail, is currently in Switzerland, according to Spanish media.
Llarena also issued international arrest warrants for Mr Puigdemont, who is in self-imposed exile in Belgium along with four of his former ministers.
All five left Spain following a proclamation of independence for Catalonia in October. One of them, Clara Ponsati, has since moved on to Scotland.
Four other separatists had already been detained by the Spanish authorities.
In total 25 people, the core of the movement, have been indicted over last year's independence drive.
SPECS
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Coffee: black death or elixir of life?
It is among the greatest health debates of our time; splashed across newspapers with contradicting headlines - is coffee good for you or not?
Depending on what you read, it is either a cancer-causing, sleep-depriving, stomach ulcer-inducing black death or the secret to long life, cutting the chance of stroke, diabetes and cancer.
The latest research - a study of 8,412 people across the UK who each underwent an MRI heart scan - is intended to put to bed (caffeine allowing) conflicting reports of the pros and cons of consumption.
The study, funded by the British Heart Foundation, contradicted previous findings that it stiffens arteries, putting pressure on the heart and increasing the likelihood of a heart attack or stroke, leading to warnings to cut down.
Numerous studies have recognised the benefits of coffee in cutting oral and esophageal cancer, the risk of a stroke and cirrhosis of the liver.
The benefits are often linked to biologically active compounds including caffeine, flavonoids, lignans, and other polyphenols, which benefit the body. These and othetr coffee compounds regulate genes involved in DNA repair, have anti-inflammatory properties and are associated with lower risk of insulin resistance, which is linked to type-2 diabetes.
But as doctors warn, too much of anything is inadvisable. The British Heart Foundation found the heaviest coffee drinkers in the study were most likely to be men who smoked and drank alcohol regularly.
Excessive amounts of coffee also unsettle the stomach causing or contributing to stomach ulcers. It also stains the teeth over time, hampers absorption of minerals and vitamins like zinc and iron.
It also raises blood pressure, which is largely problematic for people with existing conditions.
So the heaviest drinkers of the black stuff - some in the study had up to 25 cups per day - may want to rein it in.
Rory Reynolds
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COMPANY PROFILE
Company name: Blah
Started: 2018
Founder: Aliyah Al Abbar and Hend Al Marri
Based: Dubai
Industry: Technology and talent management
Initial investment: Dh20,000
Investors: Self-funded
Total customers: 40
