Watch Clinton Rogers report on the find

They have found a set of keys that they believe may have belonged to the murderer.

The keys, one brass and the other silver-coloured, were recovered from the wood where 22-year-old Jenny's strangled and battered body was found last week near her Bristol home.

House-to-house inquiries

Detective Superintendent Bill Davies, who is leading 100 officers in the murder hunt, said the keys were vital to police inquiries.

Davies: Keys could be vital clue

He appealed for anyone who recognised them to come forward.

He also said the police were now beginning house-to-house inquiries to find the owner of the keys.

He said detectives would also be carrying out interviews with a number of people.

Murder

Ms King, who worked as a receptionist, was last seen leaving a nightclub with friends in Kingswood on Saturday, 31 October.

Police are not certain whether she took a taxi or decided to make the 20-minute walk home alone.

Jenny King: Strangled near her home

Ms King lived with her parents in Warmley and had a steady boyfriend.

Her parents described her as a home-loving and caring young woman devoted to her family. They say there were "no problems" in her life.

Police set up a reconstruction of Jenny's disappearance at the weekend.

A young woman from the Support Group of Avon and Somerset Police re-enacted her last known movements.

Police said the exercise had turned up several pieces of "quite interesting" information.