An inmate with no history of extremism told guards he had staged a jihadist attack after luring officers into his cell and lunging at them with an improvised weapon, it was claimed last night. Xeneral Imiuru, 20, allegedly launched the attack in Winchester Prison from his cell in the segregation unit last Thursday, according to The Times. Imiuru, who is Britain"s first convicted acid attack killer, was jailed in 2018 for manslaughter. He has reportedly begun showing a growing interest in extremism and attempted to forge relationships with jihadist prisoners. In the early hours of Thursday, he is said to have faked a suicide attempt and lay motionless in his cell, luring three officers in before jumping on them and lunging towards them with a sharpened instrument that he had strapped to his arm, it has been claimed. No injuries were suffered in the attack, which has been confirmed by the Prison Service. A service spokesman said: "Police are investigating an incident at HMP Winchester on Feb 13. Violence against our hard-working staff will not be tolerated and those responsible will face tough punishment, including more time behind bars." On Jan 9, the first Islamist attack behind bars in the UK was staged in HMP Whitemoor, Cambs, when a convicted extremist and a Muslim convert wearing fake suicide vests went on the rampage, attacking officers with makeshift blades. Five members of staff at HMP Whitemoor in Cambridgeshire were injured, one seriously.