BARCELONA—Hundreds of thousands of Catalan independence supporters clogged one of Barcelona’s main avenues on Saturday to demand the release of separatist leaders held in prison for their roles in the region’s banned drive to split from Spain.
Wearing yellow ribbons on their lapels to signify support, they filled the length of the Avenue Marina that runs from the beach to Barcelona’s iconic Sagrada Familia church, while the jailed leaders’ families made speeches.
