Bryan Singer's attorney has slammed a fresh sexual assault allegation filed against the filmmaker in New York.

Officials at the New York Police Department (Nypd) Special Victims Squad are investigating a complaint filed by a man in his early 20s in May (14), reportedly accusing the X-Men director of abusing him during an incident on 23 March, 2013, according to the New York Daily News.

Further details about the rumoured altercation have yet to be revealed, but Singer's legal representative, Marty Singer, who is no relation to the filmmaker, tells Buzzfeed.com, "My client did not engage in any criminal or inappropriate behaviour with anyone in New York or elsewhere."

News of the Big Apple complaint emerges hours after Michael Egan Iii voluntarily dropped his lawsuit against Singer on Wednesday (27Aug14), after he accused the moviemaker of molesting him at a party in Hawaii back in 1999, when he was just 17.

It was the second teen sex abuse case against Singer to be dismissed in as many months after an unnamed British actor withdrew a similar suit in July (14).

Singer vehemently denied the allegations in both cases.