Spain's chief prosecutor has called for charges including rebellion to be laid against Catalan leaders following the region's declaration of independence.
José Manuel Maza said the charges should also include sedition and provocation by regional officials.
It comes as Spain acts to take direct control of Catalonia, replacing senior officials. Meanwhile, former Catalan leader Carles Puigdemont is reported to be in the Belgian capital, Brussels.
Mr. Puigdemont is with other dismissed Catalan ministers and will meet Flemish politicians, Spanish media report. He was removed from office on Friday after the regional parliament declared independence.