The justice secretary has told police chiefs that advances in technology mean prison walls alone are no longer effective in stopping criminals.
Organised gangs and networks were treating prisons as lucrative and captive markets to push drugs, mobile phones and other contraband, creating "a thriving illicit economy", said David Gauke.
Addressing the Association of Police and Crime Commissioners (APCC) and National Police Chiefs' Council (NPCC), Gauke said there was a link between crime inside as well as that outside prisons.
"I believe prisons have emerged as a new frontline in the fight against crime," he said. "The fact is, new technology and sophisticated approaches mean that prison walls alone are no longer effective in stopping crime – inside or outside of prison.
"Offenders who commit crime in prison have a disruptive and often devastating impact on the prospects of those who are trying to turn their lives around and who see prison as a pivotal turning point in their lives."
Gauke noted recent successes in fighting organised crime, behind bars, included a joint operation by prison intelligence officers and police. It broke up an organised crime gang that had used drones to smuggle £1.2m worth of contraband into prisons across the UK.
The government is spending £70m to improve the safety and stability of prisons. Plans are in place to provide x-ray scanners to help stem the influx of the drugs fuelling much of the violence.
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