Charlene Downes (pictured) disappeared from her home town of Blackpool on Saturday, November 1, 2003

Detectives investigating the disappearance of a teenage girl have released new CCTV footage of her on the day she vanished 13 years ago.

Charlene Downes, 14, disappeared from her home town of Blackpool on Saturday, November 1, 2003. No trace of her has ever been found.

The newly released CCTV shows Charlene with her sister Rebecca on Bank Hey Street in Blackpool town centre at 3.25pm on the same Saturday afternoon.

The pair are seen walking towards the Coral Island amusement arcade.

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Charlene returned home shortly after the images were captured but then went back out into Blackpool town centre later that evening. She was never seen again.

The clothes she is wearing in the new footage are the same ones she had on when she vanished.

Despite a long investigation, numerous media appeals and a £100,000 reward, nobody has ever been brought to justice.

The images, which have been released for the first time, show Charlene with her sister Rebecca (pictured right) on Bank Hey Street in Blackpool town centre at 3.25pm on the same day she disappeared

The clothes Charlene (pictured right with her sister) is wearing in the new footage are the same ones she had on when she vanished. She returned home shortly after the images were captured but then went back out into Blackpool town centre later that evening

Despite a long investigation, numerous media appeals and a £100,000 reward, nobody has ever been brought to justice. Two men kebab shop workers were aquitted of her murder in 2007 and detectives hope the CCTV will bring new leads in the case

Takeaway workers Iyad Albattikhi and Mohammed Reveshi were acquitted of her murder in 2007.

The pair worked at Funny Boyz fast food shop in Blackpool and the trial heard Charlene's body was chopped up and had 'gone into kebabs'.

The jury failed to reach a verdict and the prosecution dropped the charges during a re-trial.

A team of detectives continue to work on the case and the new footage has been uncovered following a review of the CCTV.

Detective Superintendent Andy Webster, from Lancashire Police, said: 'It has been thirteen years since Charlene disappeared but we are as determined as ever to find her killer or killers.

'Hopefully these pictures of Charlene on the day she disappeared will help jog someone's memory and I would urge anyone with information, however insignificant they feel it may be, to come and speak to us.

'I have always been convinced that there are people who know what happened to Charlene but have not yet come forward to speak to the police.

'You may have been present when she was murdered or may simply have information about how she was killed and what happened to her body.

'For whatever reasons, you may have chosen not to speak out previously, and I can understand that, but as we seek to find out what happened your information could be vital to take the case forward.

Charlene was wearing a pair of jeans similar to the ones pictured when she disappeared

'If anyone is reluctant to speak to us for fear of reprisals I would reassure them that every measure is taken to ensure their safety.

'Also, if you are afraid you could incriminate yourself, let me reassure you that our main objective is to find Charlene's killer or killers.

'As part of our inquiries we are also focussing on the wider issue of child sexual exploitation in Blackpool at around the time of Charlene's disappearance and we have identified a number of people who could potentially be victims and offenders, and we will be seeking to make arrests and to prosecute abusers in the near future.'

In June, detectives working on the inquiry arrested two men on suspicion of historic sex offences.

Kashif Gul, 39, of Foxhall Road, Blackpool, is charged with rape, attempted rape, gross indecency with a child and indecency with a child.

Another 50-year-old man from Blackpool was arrested on suspicion of indecent assault and taking indecent images of a child. He was bailed but is now wanted after failing to answer his bail.

The above offences were allegedly committed in the early 2000s and relate to two girls aged 14 or 15 at the time. There is no suggestion of a direct link to Charlene.