Thousands of people demonstrated in Madrid on Sunday against Spanish Prime Minister Pedro Sanchez's proposed talks to ease political tensions in Catalonia, in a protest organized by center-right and far-right opposition parties.

Demonstrators waving Spanish flags filled the Plaza de Colon in the city center in the largest protest Sanchez has faced, with their slogan "For a united Spain, elections now!" a reminder of the pressure on his minority government.

The Socialist government's proposal last Tuesday to appoint a rapporteur in talks among political parties to address the Catalan independence crisis galvanized the opposition, which has deemed it a betrayal and a surrender to pressure from Catalan separatists. The opposition has called for early elections.