LaLiga will report racist insults aimed at Barcelona's players during the Clásico to police and prosecutors, the league said on Sunday.
Video footage appeared to show Lamine Yamal being insulted after scoring Barcelona's third goal in the 4-0 win over Real Madrid at the Bernabéu.
LaLiga "energetically condemns" what happened, the league said.
"Given the events that occurred during the game between Real Madrid and Barcelona, in which intolerable racist behaviour was observed, LaLiga will immediately report the racist insults and gestures aimed at Barcelona players to the National Police's Hate Crime Group, as well as informing the Coordinating Hate Crimes Prosecutor with the Hate Crime and Discrimination Unit at the State Attorney General's Office," the league said in a statement.