"Valencia wish to reiterate the club's firm condemnation of any violence in any form while respecting the presumption of innocence that our legal system promulgates," the club said in a statement.
"The justice system must decide the course of action regarding the allegations for which Rafa Mir is being investigated. However, as far as the club is concerned, and within the framework of its competencies, we have analysed the situation and decided to undertake disciplinary measures.
"Specifically, the club will proceed to open a case against Rafa Mir as we feel his way of behaving, in his time off, indisputably affects the professional performance expected of him as a player of this club, damaging, in addition, the confidence that our fans have in all of the players. The club will continue to collaborate with the police in whatever way required."