By Jonathan Davies

The UK's National Crime Agency (NCA) has arrested 56 suspected hackers in a "strike week" on cybercrimes.

Twenty-five raids were carried out across the UK which targeted people suspected to be involved with data theft, fraud and virus writing.

The operations were coordinated between the NCA's National Cyber Crime Unit (NCCU), regional organised crimes squads and Metropolitan Police. The biggest operation saw 25 people arrested in London and Essex suspected of stealing funds and money laundering.

It is understood that a member of well known group of hackers, the Lizard Squad, was arrested in Leeds.

One of those arrested in London is believed to have been involved with a hack on Yahoo in 2012. BBC technology correspondent Rory Cellan-Jones accompanied one of the NCA teams on the raid.

He wrote: "The priority was to make sure any computers were seized before they could be shut down or their data encrypted.

"Teams arrived with equipment to gather data, and found a laptop and a desktop computer, both of them online. One officer was employed simply keeping her finger on the laptop's trackpad to make sure it didn't go to sleep. Later, police cyber-specialists would spend many hours examining exactly what was on the two computers."

"Criminals need to realise that committing crime online will not render them anonymous to law enforcement," said Andy Archibald, deputy director of the NCCU. "It's imperative that we continue to work with partners to pursue and disrupt the major crime groups targeting the UK."