Moors murderer Ian Brady will be questioned by police after allegedly assaulting a nurse.
Brady, 73, is accused of using a jug to threaten the woman during an incident on July 6 at Ashworth Hospital, Merseyside, where the notorious serial killer is held.
The 51-year-old nurse was said to have been left distressed and later reported the incident to bosses at the high-security hospital.
A formal complaint was made by the nurse to Merseyside Police on Wednesday.
It means Brady will be questioned by officers over an allegation of common assault. The alleged assault is not sexual and resulted in no injury.
Sources said they believed Brady had been walking along holding a jug and during the incident with the nurse the jug may have "brushed" the nurse, as Brady "gesticulates" a lot.
But Richard Nicholas, of RMNJ solicitors, acting for Brady, denied the killer had done any wrong. Mr Nicholas said: "Ian Brady denies any improper conduct or assault."
A police spokesman said: "Merseyside Police can confirm that it is aware of an incident in July involving a patient and staff member at Ashworth Hospital in which the staff member was allegedly assaulted.
"A formal complaint has now been made and a police investigation is under way. Officers are in contact with the employee and the hospital management with a view to progressing the matter."
Brady and his partner, Myra Hindley, were responsible for the murder of five youngsters in the 1960s.