The Manchester United football club said it has suffered a cyber security incident that impacted its internal systems.

The football club, which disclosed the breach last Friday, said it's still investigating the incident and that it is not “currently aware of any breach of personal data associated with our fans and customers.”

“Manchester United can confirm that the club has experienced a cyber attack on its systems. The club has taken swift actions to contain the attack and is currently working with expert advisers to investigate the incident and minimize the ongoing IT disruption,” the football club said in a short statement.

While Manchester United did not reveal the nature of the cyber attack, it admitted that it was “a sophisticated operation by organized cyber criminals.”

The club also said that “our cyber defenses identified the attack and shut down affected systems to contain the damage and protect data.”

United officials said that the security incident did not affect the club’s media channels, including it’s website and mobile app.