(CNN)Athletic Bilbao fans threw fake bank notes onto the pitch inside the San Mamés Stadium to signal their displeasure with the alleged payment scandal surrounding La Liga rival Barcelona.
The two teams faced each other in the league on Sunday, two days after Barcelona had been charged by prosecutors with "continued corruption between individuals," in addition to other charges.
Raphinha scored the only goal of the match as Barcelona won 1-0 and moved nine points clear at the top of La Liga, though the ongoing payment scandal has continued to engulf the club off the field with a number of former officials, including ex-president Josep Maria Bartomeu, also charged.
The Barcelona's Prosecutor's Office has been investigating the soccer club over allegations it made $1.5 million in payments during a three-year period to a company owned by a then-leading official with Spain's referee committee, the CTA.
A Barcelona source told CNN on Friday that the club did not have an official statement. Its first reaction was that the charges were to be expected after recent events and that the club would assist the investigation in any way possible.
The source also strongly denied that the club had at any time bribed a referee or tried to influence refereeing decisions.