Spain's national police have seized thousands of marijuana plants due for export to the UK and made eight arrests after raids in Barcelona and Girona.
Belgian Prime Minister Charles Michel denied his government was in "crisis" over the arrival of deposed Catalan leader Carles Puigdemont, an issue which risks reigniting Belgian communal tensions.
Protesters have blocked the railway linking Girona with France as well as several other lines and highways in Catalonia protesting for the freedom of politicians and campaigners detained over the region's pro-independence drive.
As Catalonia's separatist crisis drags on, Spain's judiciary has found itself on the back foot, accused of engaging in the type of partisanship normally associated with repressive dictatorships.
"Mr Juncker and Tajani, is this is the Europe that you want to build... with a country that puts leaders in prison?" the deposed Catalan leader said in a public statement in Brussels.