Manchester Arena bomb plotter Hashem Abedi has been charged with three counts of attempted murder.
It comes after four prison officers were injured in an attack at HMP Frankland in Co Durham on 12 April.
The incident is being investigated by Counter Terrorism Policing North East, alongside Durham Constabulary.
Abedi has also been charged with one count of assault occasioning actual bodily harm and one count of unauthorised possession of a knife or offensive weapon.
He is due to appear at Westminster Magistrates’ Court on 18 September and remains in prison.
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