A whistle-blower has told police in France that Prince Andrew had been a regular visitor to billionaire paedophile Jeffrey Epstein's £7million apartment in Paris.

Detectives in the French city are now probing reports that the Queen's son was often at the property.

It comes as the apartment was raided last week, with officers having discovered a custom-made massage parlour where Epstein and his friends are alleged to have raped their victims.

Now a key witness has claimed that he spotted Prince Andrew at the building on more than one occasion.

It has been claimed that Prince Andrew (left) visited Jeffrey Epstein's Paris apartment on more than one occasion (Epstein, right)

The apartment building (above) owned by Epstein is thought to have hosted parties for businessmen and politicians

Speaking to The Sun, the source, who cannot be named for legal reasons said: 'Prince Andrew stayed at the address a number of times including when Epstein was not there.'

The paper also reported that the Duke is expected to avoid travelling to the country while the probe is ongoing.

The Paris apartment is said to have been used to entertain guests from politicians, businessmen and models.

It comes as the Duke of York could become further engulfed in the Epstein scandal, after police in the US seek to talk to alleged victims of the late American billionaire.

The US law enforcement agency expects to interview alleged trafficking victims over the next two months, and Scotland Yard is ready to assist.

The FBI are said to be looking to 'several' potential victims in the hope that they can provide more detail.

The report quotes former head of royal protection at Scotland Yard, Dai Davies, saying a full investigation would be in Prince Andrew's best interests.

'I would have thought it's in Prince Andrew's interests to clear this matter up,' Mr Davies, who headed Prince Andrew's protection in the late 1990s, told The Sunday Times.

Virginia Roberts Giuffre (centre aged 17) claimed in a lawsuit dropped in 2015 that she was forced to have sex with the Duke of York (left) at the London home of Ghislaine Maxwell (right)

This is while witnesses in the ongoing French inquiry include 'sex slave' Virginia Roberts', who has appeared on camera, claiming that she was forced to have sex with Prince Andrew when she was just 17.

The claims have always been denied by Prince Andrew, however Miss Roberts has said she is prepared to testify against him in court and said he was an 'abuser and participant' in a worldwide sex trafficking ring.

It is claimed that the sex trafficking ring also included 12-year-old twin girls that had been 'recruited' in Paris.

The identities of the youngsters have been withheld but it is thought that they had been sent to the US for Epstein to abuse – while other girls were attacked in Paris.

The whistle-blower has been the caretaker of the Avenue Foch apartment since the early 2000s.

Epstein was jailed in the US in 2008 for over a year, however, it is not clear when the whistle-blower's allegation relate to.

Also speaking to the Sun, an investigating source said: 'The apartment was searched from top to bottom, and everybody who was associated with (Epstein) will now need to be spoken to.

'Those regularly in residence in the Foch property included politicians, business people and plenty of young models and masseurs, who ended up being raped.'

He added that guests also included Epstein's girlfriend Ghislaine Maxwell, who has denied any criminal behaviour.

It was also reported this week that guests at the apartment had included people such as Bill and Melinda Gates.

Alleged ties: Jeffrey Epstein's butler Gabriel said Bill and Melinda Gates had visited the pedophile's Paris apartment (couple above in February)

Epstein's former Butler, known as Gabriel, who worked there for 18-years, said that Prince Andrew, former Israeli Prime Minister Ehud Barak and Steve Bannon were also guests at the residence - as were a number of 'very young, very thin and very tall girls'.

Those girls, who he said in recent years all looked to be of age, were kept separate from the other guests at all times according to Gabriel.

Andrew has previously said in a statement: 'At no stage during the limited time I spent with him (Epstein) did I see, witness or suspect any behaviour of the sort that subsequently led to his arrest and conviction.'

Buckingham Palace could not be reached for comment this morning.