A Spanish government commission has fined three Real Madrid fans who attacked players' cars, including that of Wales international Gareth Bale.
Following last weekend's defeat by Barcelona, fans attacked Bale's Bentley at the club's training ground.
Forward Jese Rodriguez and coach Carlo Ancelotti were also targeted.
Real said one of the three men had been identified as a member and had been banned pending a disciplinary hearing on whether to expel him from the club.
The government's anti-violence in sport commission imposed the fines as well as a six-month ban from sports stadiums.
Second-placed Real's defeat left them four points behind La Liga leaders Barca with 10 games remaining.