A teenage girl claims that an NYPD detective raped her and another forced her to perform oral sex after she was caught smoking pot in Coney Island.

The young woman says sought help from NYU Langone Hospital, in New York, after the incident around two weeks ago. She also spoke to a friend about the alleged sexual assault and reported it to the cops.

The two detectives, from the NYPD's Brooklyn South narcotics squad, did not deny the sexual acts but claimed they were consensual, sources told the New York Post.

A teenage girl claims that an NYPD detective raped her and another forced her to perform oral sex after she was caught smoking pot in Coney Island (file image)

Brooklyn District Attorney's Office is now investigating the teen's claims, alongside the Internal Affairs Bureau which has already called several police officers in for questioning, law enforcement sources said.

The head of the local detectives union declined to comment, citing the 'active investigation going on.'

The names of the two detectives have not been released to the public.

However, a source said that a detective from the same unit was disciplined on September 14 - around the same time as the alleged sexual assault was said to have taken place - for having an unauthorized person in a department vehicle at Bay 44th St. and Calvert Vaux Park, Coney Island.

It wasn't clear if the detective was involved in the alleged rape.

Meanwhile, another Brooklyn-based cop was in court earlier this month for allegedly assaulting and intimidating a Coney Island man over a spilled drink.

The alleged rape and sexual assault is said to have taken place in Coney Island (file picture)

NYPD Officer O'Keefe Thompson was indicted on one count of intimidating a witness, two counts of third-degree assault and two counts of official misconduct on Monday 18 September.

He is accused of assaulting Raymond Crespo on July 8, after Crespo refused to pick up a cup of alcohol he dropped on the floor.

Crespo sought help for a bruised eye and concussion at the local hospital and reported the assault to housing officers.

The following day, when Thompson was off-duty and in plainclothes, he allegedly 'sought the victim and asked him 'Why you s**t on my name?'' Assistant District Attorney Peter Choi said, according to New York Daily News.

Thompson had been placed on modified duty during the investigation and could face up to four years in jail if convicted.