Former Barcelona president Josep Maria Bartomeu was among those arrested on Monday following a raid at the team's office, according to ESPN.
A local police spokesperson confirmed to ESPN that authorities made multiple arrests but would not disclose the names of those involved.
Spanish radio station Cadena SER first broke the news on Monday.
Authorities reportedly arrived at Camp Nou looking for evidence related to last year's "Barcagate" scandal, where team officials were accused of hiring third-party company I3 Ventures to smear former and current players and presidential candidates on social media for criticizing the club.