A situation serviceman has been airlifted to infirmary aft being stabbed astatine a high-security men's prison.
West Mercia Police said officers were called to HMP Long Lartin successful South Littleton, Worcestershire, soon aft 10am connected Friday morning.
The 25-year-old "sustained superior injuries and was airlifted to hospital," the unit added. They are inactive successful hospital, but successful a unchangeable condition.
A 22-year-old fishy is being held successful custody wrong the prison, and a limb has been recovered, the unit said.
In a follow-up statement, the constabulary said audio footage circulating online, and claiming to beryllium from the aftermath, is not connected to the incident.
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Assistant Chief Constable Grant Wills said: "Whilst our probe is successful its aboriginal stages, we would similar to clarify that this incidental is not being treated arsenic terrorism.
"Our archetypal enquiries suggest determination was a disagreement betwixt an inmate and situation serviceman that escalated and is an isolated substance wrong the prison."
HMP Long Lartin is class A and class B situation with abstraction for implicit 600 inmates.