Bury-based FTSE 100 retailer JD Sports Fashion plc announced it has been the target of a cyber incident which resulted in “the unauthorised access to a system that contained customer data relating to some online orders placed between November 2018 and October 2020.”

The affected JD Sports group brands are JD, Size?, Millets, Blacks, Scotts and MilletSport.

“The affected data is limited,” said the company.

“JD Sports does not hold full payment card data and, further, has no reason to believe that account passwords were accessed.

“The information that may have been accessed consists of the name, billing address, delivery address, email address, phone number, order details and the final four digits of payment cards of approximately 10 million unique customers.

“We have taken the necessary immediate steps to investigate and respond to the incident, including working with leading cyber security experts.

“We are engaging with the relevant authorities, including the UK’s Information Commissioner’s Office (ICO), as necessary.

“We are proactively contacting affected customers so that we can advise them to be vigilant to the risk of fraud and phishing attacks.

“This includes being on the look-out for any suspicious or unusual communications purporting to be from JD Sports or any of our group brands.”

JD Sports Chief Financial Officer Neil Greenhalgh said: “We want to apologise to those customers who may have been affected by this incident.

“We are advising them to be vigilant about potential scam e-mails, calls and texts and providing details on how to report these. “We are continuing with a full review of our cyber security in partnership with external specialists following this incident.

“Protecting the data of our customers is an absolute priority for JD.”