Police have dropped a probe into an alleged VIP paedophile ring murder after finding there was no evidence to support the claims.

Officers launched an investigation after a 'witness' made a series of claims, including that a girl had died during a VIP paedophile party at the Dolphin Square apartments in Westminster.

But police have reportedly halted their inquiries amid a lack of evidence to back up the claims of the the man, named only as Darren.

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Officers launched an investigation after a 'witness' made a series of claims, including that a girl had died during a VIP paedophile party at the Dolphin Square apartments in Westminster

According to a report by James Gillespie of the Sunday Times, detectives have become concerned about his behaviour and referred his son to social services.

Darren had sparked an investigation after claiming that he knew of a teenage girl who died during a party at the London flats in the 1990s.

Darren said that the girl disappeared into what was known as the 'medical room' at the apartment block - but that he never saw her again and later said he feared she was dead.

In an interview with the website Exaro, he said he came into contact with the gang, which he claimed included a senior Conservative politician, at the age of 15.

He also claimed that paedophile Peter Righton had been involved in the death of a man in his 30s on the Thornham Magna estate in Suffolk.

But Suffolk Police now believe Darren and Righton, who died in 2007, never came into contact, the Sunday Times reports.

A police spokesman said: 'We fully investigated the claims and these have been found to be unsubstantiated.

The 'witness' also claimed that paedophile Peter Righton had been involved in the death of a man in his 30s

Explaining the referral of Darren's son to social services, the spokesman added: 'We have a duty of care to protect young people where a concern has been raised for their wellbeing.'

After the decision to drop the probe, Darren is reported as saying: 'My allegations are true, I have no reason to lie to anyone, I've never made any money from speaking out and neither would I want to. I told the truth in the belief that there would be justice.'

It comes a week after the Daily Mail revealed Scotland Yard had 'grave doubts' about the testimony of another 'witness' called Nick.

Officers said they had not found a ‘shred of credible evidence’ to back up claims that a string of senior Establishment figures were responsible for murdering three boys in the 1970s and 1980s.

Many detectives believe the inquiry – which has already cost the taxpayer more than £1million – is doomed and should be wound up.