Customers of fashion giant JD Sports have been warned to "be vigilant" after it revealed it has been hit by a cyber attack.
The incident 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 Bury-headquartered group has confirmed.
The affected JD Sports group brands are JD, Size?, Millets, Blacks, Scotts and MilletSport.
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In a statement to the London Stock Exchange, the group added that the "affected data is limited". It added that it does not hold full payment card data and "has no reason to believe that account passwords were accessed".
JD Sports said 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.
The group said: "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."
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."
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