Manchester United are reportedly being held to ransom for millions of pounds by cybercriminals who hacked into the club's systems last week.
The Red Devils released a statement admitting that they were hit by a cyber attack, but claimed that they were not “currently aware of any breach of personal data associated with our fans and customers”.
However, as reported by the Daily Mail, the hackers still have control of the club's systems, and The National Cyber Security Centre has confirmed it is helping United resolve the crisis.
It said: "The NCSC is aware of an incident affecting Manchester United Football Club and we are working with the organisation and partners to understand impact."
The BBC report that United aren't willing to confirm if they have received ransom demands, and rejected suggestions the attackers still had control of the systems.
United said in a statement: "Following the recent cyber attack on the club, our IT team and external experts secured our networks and have conducted forensic investigations. This attack was by nature disruptive, but we are not currently aware of any fan data being compromised.
"Critical systems required for matches to take place at Old Trafford remained secure and games have gone ahead as normal. The club will not be commenting on speculation regarding who may have been responsible for this attack or the motives behind it."