BERLIN : Hundreds of Catalan independence supporters marched in Berlin on Sunday to demand the release of ex-regional president Carles Puigdemont, who was arrested in Germany last week and faces extradition to Spain on rebellion charges.

Huddled under umbrellas in the rainy German capital, the protesters walked from Brandenburg Gate to the justice ministry, carrying banners that read "Free Puigdemont and the Catalan political prisoners" and "Spain is not a democracy". Many also waved Catalonia's blue, yellow and red separatist flag as they took part in the rally organised by the German branch of the Catalan National Assembly (ANC), a major grassroots pro-independence group.

"What we want to say is simply: free our elected Catalan politicians," said 34-year-old marketing worker Monica Zaldivar, who accused the Spanish government of using the courts to go after Catalan leaders instead of trying to find a political solution.

"For me, it's about democracy in Spain," she said.

One of the organisers, Ferran Cornella, told AFP he estimated the crowd to number "400 or 500" people, while police gave a tally of around 200 demonstrators.

Puigdemont was arrested by German highway police last Sunday as he was travelling from Finland back to Belgium, where has been living in self-imposed exile since Catalonia's failed independence bid last October.