A police officer visiting HMP Frankland, a Category A men's prison in Durham, was stabbed in the chest Tuesday morning. The officer, from an outside force, was rushed to the hospital and is reported to be 'conscious and talking'. The incident occurred around 11am, leading to a prompt response from Durham Constabulary. HMP Frankland, known for housing high-profile violent inmates, has seen similar violent incidents in the past. The authorities are continuing their investigation into the attack.