Barcelona may face a potential penalty from the European Football Association "UEFA" following the incident that occurred before the team's match against Atlético Madrid, according to the newspaper "Mundo Deportivo".

The incident occurred as a result of Atlético Madrid's bus being pelted with stones upon its arrival at Spotify Camp Nou, a situation that had previously happened during this season's cup match. The incident took place on the street leading to the stadium, resulting in no injuries among the visiting team's delegation but causing specific material damage.

UEFA's regulations in Article 16 regarding order and safety at UEFA competition matches state that host clubs and national associations are responsible for order and safety inside and around the stadium before, during, and after the match. Any violation or failure in organization exposes the club to disciplinary actions and penalties unless they can prove no negligence occurred.

The decision of UEFA's disciplinary body will be awaited, but current indicators suggest that Barcelona may face a financial fine due to this incident, given the host club's responsibility for the safety of teams and delegations before, during, and after matches.