These arrests are part of a larger investigation into a group of hackers believed to be linked to a loose online network known as Scattered Spider.

Crime-fighting agency cagey on details, probes into intrusions at M&S, Harrods, and Co-op continue The UK's National Crime Agency (NCA) arrested four individuals suspected of being involved in the big three cyberattacks on UK retail businesses in recent weeks.

Spate of attacks in April led to product shortages and cost M&S, Co-op and Harrods hundreds of millions of pounds