Proposed changes to legislation that allows authorities to fine media for distributing unauthorised images of police and limits demonstrations has been met with backlash from police and far-right parties.
Cruelty Free International has published footage that appears to show Vivotecnia lab cutting into animals without having received anaesthetics.
Demonstrators shouted slogans such as "Freedom for Pablo Hasel" and "We are the anti-fascists", as they took to the streets in the Spanish capital.
EU countries take preventive measures to bar people from unauthorised trips during the holiday, which coincides with rates of coronavirus infection slowing in many countries.
Police are investigating footballers, ex-players and club executives over suspicions of forming a match-fixing group to profit from betting on games, Spanish newspaper El Pais reports.
Tensions are running high in Spain's northeastern Catalonia before Monday's anniversary of an illegal referendum on independence held by regional lawmakers.
German authorities have 60 days to decide whether to extradite region's former president Carles Puigdemont to Spain and comes five months after he went on run after vote on independence.
The central government in Madrid is staunchly against the vote, which has been ruled unconstitutional by the courts, and has used all legal tools at its disposal to stop it from taking place.
Police sealed off 1,300 of 2,315 schools in Catalonia earmarked as polling booths for the banned independence referendum, government sources say.
Spanish media says between 3,000 and 4,000 state officers have already arrived, or are on their way to Catalonia. The reinforcements will join 5,000 state police already based in the region.
Thousands gather at the gates of Catalonia's judicial body in Barcelona to demand the release of a dozen officials arrested in connection with the vote on independence that Spanish authorities are challenging as illegal.
Spanish police arrested at least 12 people in raids on Catalan government offices as national authorities intensified a crackdown on the region's preparations for a secession vote.
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