DAVOS, Switzerland (AFP) - Britain's Prince Andrew arrived in Davos on Thursday for his first official engagement following lurid claims he had sex with an underage girl employed by an American billionaire and convicted sex offender.

The allegations, which surfaced late last month, forced Buckingham Palace to issue an unprecedented public denial.

Andrew, known as the Duke of York, was greeted with a barrage of cameras as he arrived in the glitzy Swiss Alpine resort of Davos where the world's rich and powerful are gathering.

About 200 people were expected at his Pitch@Palace reception later Thursday - an event aimed at showcasing British digital talent.

Royal officials have confirmed he will speak but have declined to say whether he will comment on the allegations, doing little to dispel enormous media interest around his appearance at the Belvedere Hotel in Davos.

Andrew owns a chalet near Davos and often attends the forum, usually passing largely unnoticed among the assorted global elites headlining the talks at the World Economic Forum.

The woman at the centre of the scandals says billionaire financier Jeffrey Epstein, a former friend of the duke, forced her into sexual relations with Andrew when she was 17.

Her lawyers said in a letter released on Wednesday they want Queen Elizabeth II's second son to respond under oath to the allegations.

The lawyers asked that Prince Andrew be interviewed "regarding interactions that you had with Jane Doe #3 beginning in approximately early 2001".

The request states the interview should last about two hours and includes a photograph of the prince with his arm around the woman.

The law office of Bradley Edwards, who represents the woman, told AFP it had no additional comment.

Buckingham Palace also declined to comment.

The woman alleges she was "forced to have sexual relations" with Andrew, who is now 54, meeting him in London, New York and the Caribbean at the behest of billionaire financier Epstein.

She claims Epstein had kept her as a "sex slave."

Epstein was convicted in 2008 of soliciting an underage girl for prostitution and served a prison term.

Buckingham Palace has repeatedly and strongly denied the allegations against Andrew, calling them "false and without foundation."