Police today released chilling photos of a double rapist as he walked with his terrified victim before subjecting her to a sickening 80-minute sex ordeal.

The cool and calculating sex beast was captured on CCTV, marching the 27-year-old woman through the streets of Bradford before twice carrying out serious sex assaults on her.

Detectives hope the pictures will help trace the rapist, who they revealed today had pestered two other women days before the attack.

A man fitting the description of the rapist approached one woman and made a sexual comment to her.

A second woman saw a similar man crouching behind a wall and thought he was going to pounce on her. She shouted and ran off.

The incidents happened on December 7 and December 20 in the same area, days before the woman was attacked in the early hours of Monday, December 27.

The rapist grabbed the woman as she walked in Great Horton Road, near the junction with Claremont, at about 1.15am, after she had enjoyed a Boxing Day night out with friends. She had intended to walk to a taxi rank but got lost.

The attacker forced her to a nearby car park, where he carried out the first assault, before marching his victim down Claremont, turning right at the junction with Easby Road and cutting into the grounds of the University of Bradford.

He took her to a football pitch off Trinity Road and raped her for a second time.

The victim was then dragged back into Great Horton Road and taken to a HSBC cash machine at the junction of Mannville Terrace, where the suspect tried to force her to withdraw money. When he was unable to get any cash he banged her head against the machine.

The woman, who was bruised and distressed by her ordeal, escaped when she ran in terror to three men passing by. Two of them chased the suspect down an alleyway but lost sight of him. She was treated by a doctor.

Police released the CCTV images of the suspect and his victim walking along Mannville Terrace, in a fresh bid to track down the wanted man. They have been trawling through hours of footage.

They also reissued an e-fit photo of the suspect, who was olive-skinned, with very dark almond-shaped eyes, black moustache and black hair on his chin, dark eyebrows and short, black, tidy hair. He was in his mid to late 20s, slim and about 5ft 7-8ins tall, and wearing black jeans and a navy blue hooded fleece, with red piping round the edges, which looked too big.

And they released a photograph of a black Nokia 6320 mobile phone, similar to that of the victim, which is still missing after the attack, along with a key ring with two mortice keys on it.

They appealed to anyone who has found a similar phone or been offered one for sale, to contact them.

Detective Inspector John Armitage, of Bradford South CID, said: "It is clear from where he has been and the route he took that he knows the area and, more than likely, lives there in bedsit-land or student-land. Someone there will know him."

He added: "During the ordeal the suspect told the woman he had a wife and children and lived in the immediate area. This could be a total fabrication, but is an indication of how cool and calculating this person is.

"This was a sickening attack on a vulnerable young woman, who must have been terrified."

Police are still anxious to hear from a passer-by who leaned over a wall of the car park and asked for a cigarette after the first assault.

The Afro-Caribbean man, who was aged about 20, was stocky, wore a cream jacket and spoke with a Jamaican accent He has not come forward despite previous police appeals.

Det Insp Armitage said: "It is entirely feasible this man did not realise that the woman was in trouble. He is a vital witness who we need to speak to urgently. We don't believe he was involved in the incident in any way."

Officers are also anxious to hear from anybody who was in the area that night who might have seen the suspect and the victim.

Police have set up an incident room and anyone with information should contact them on (01274) or Crimestoppers anonymously on 0800 555 111.