Barcelona are embroiled in a stand-off with a section of their fanbase after closing part of their home stadium, the Espai d’Animació, indefinitely. The decision, announced ahead of Tuesday’s Champions League game against Brest, stems from fines levied on the club for inappropriate fan behaviour—fines the club wants reimbursed by the supporters’ groups who occupy this section.

With the lower north stand at the Estadi Olímpic Lluís Companys left empty for the match, tensions between Barcelona’s management and their fans have spilled into public view. So, what led to this drastic action, and how did things reach this boiling point?

Barcelona’s Espai d’Animació—a designated supporters’ section—has been the subject of 14 disciplinary proceedings for inappropriate behaviour since the start of last season. These incidents have resulted in €21,000 (£18,000) in fines imposed by La Liga, UEFA, and the Catalonian government.