Catalan police made several arrests after searching the offices of La Liga side Barcelona, without confirming the number of arrests made or their identities.
A police spokeswoman confirmed the arrests, but would not comment on reports from Spanish radio station Cadena Ser that former Barca President Josep Maria Bartomeu was among those arrested as part of an operation into the club contracting a firm to monitor social media activity last year.
Barca did not immediately respond to a request for comment.
The investigation stems from the 'Barcagate' affair which was unearthed last year by Cadena Ser and revealed the club had contracted marketing consultancy I3 Ventures to monitor social media activity.
The revelations led to protests from supporters and to several board members resigning while increasing the pressure on Bartomeu, who eventually stepped down in October after facing a vote of no-confidence.
The club's members will vote to elect a new president in next Sunday's election, which was postponed from January due to Covid-19 restrictions in Catalonia.
