4 individuals have been arrested by police investigating the cyber assaults concentrating on M&S, Co-op and Harrods.
A 20-year-old girl and two males, aged 19, and one aged 17, had been detained in London and the West Midlands this morning by officers as a part of a Nationwide Crime Company (NCA) operation.
They had been arrested on suspicion of Pc Misuse Act offences, blackmail, cash laundering and collaborating within the actions of an organised crime group.
M&S stopped on-line orders and clients confronted empty cabinets in outlets after the cyber assault on the retailer earlier this 12 months.
The Co-op and Harrods had been additionally focused by hackers in April and Might.
The people had been arrested at their houses by officers from regional organised crime models and their digital gadgets had been seized for evaluation.
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