Marks & Spencer, the iconic U.K. clothing and food retailer that’s seen its online operation shuttered for more than three weeks following a cyberattack, on Tuesday said for the first time that customer data was taken.

U.K. retailers Harrods, Marks & Spencer and Co-op have all reported cyber intrusions in the past weeks. A hacking group known as Scattered Spider hasn’t been publicly named as t

Retail giant Marks & Spencer said customer personal data has been taken by hackers after it was hit by a damaging cyber attack. Chief executive Stuart Machin said the data had been accessed due to the "sophisticated nature of the incident".