Yorkshire Ripper Peter Sutcliffe may have killed eight more women, a former detective has claimed.

Keith Hellawell, who managed to get Sutcliffe to admit to two unsolved killings, said he believed the serial killer may have murdered far more victims than the 13 for which he was convicted.

Lorry driver Sutcliffe was jailed in 1981 for 13 murders and seven attempted murders between 1976 and 1981. He was given 20 life terms for the murders.

The former detective's comments come after it was reported that police visited Sutcliffe in HMP Frankland, the category A prison the killer is being housed in, to discuss 17 unsolved attacks.

The attacks, which are all on women who survived, are thought to bear striking similarities to the crimes perpetrated by the 70-year-old serial killer, dubbed the Yorkshire Ripper, before he was jailed in 1981.