COLD case detectives are looking into the unsolved murder of a 20-year-old woman who was killed just yards from where Joanna Yeates lived.

Glenis Carruthers was strangled to death nearly 37 years ago on January 19, 1974.

The incident took place near Clifton Downs in Bristol, close to the junction of Guthrie Road and College Road.

An Avon and Somerset spokeswoman said: ''The investigation remains ongoing into the death of Joanna Yeates and is not being linked to any other murder in the Avon and Somerset area.

''But it is routine procedure for information to be looked at in any crime if new information comes to light.''

At the time there were 175 police officers assisting with the case and 16,000 people were interviewed in connection with the student teacher's murder, but no-one has ever been convicted.

On the night Miss Carruthers was killed she travelled from Bedford, where she was a student, to attend a friend's 21st birthday party on Worcester Crescent in Clifton, Bristol.

Police say she left the party at around 10.20pm, possibly to get some fresh air or to make a call from a telephone kiosk, situated nearby.

Police say she was seen just after 11pm on Clifton Downs, when the witness thought he saw a courting couple on the grass.

A short time later her body was discovered.

Over the last 36 years the case has been reviewed twice and further items have been sent for forensic examination.