THE death of a fashion designer found dead on a boat at a plush Hamptons yacht club remains shrouded in mystery – days after her body was found.

Martha Nolan-O’Slattara’s body was found on board the vessel, named Ripple, on Tuesday, but cops have not revealed her cause of death.

The circumstances behind the 33-year-old businesswoman’s death remain unknown, but Suffolk County cops found no evidence of violence.

The development came after the initial examination of her death was ruled inconclusive.

Cops swooped on the Montauk Yacht Club, located around 130 miles from New York City, after receiving a call about an unresponsive woman just after midnight.

Good Samaritans desperately tried to save Nolan-O’Slattara, who moved to the US from Ireland when she was 26, but they were unsuccessful. 

The Ripple vessel was cordoned off as part of the police probe. 

A regular at the yacht club claimed the boat is owned by Nolan-O’Slattara’s boyfriend, according to the Daily Mail.

Boaters told how they heard screams coming from the boat just hours before Martha died.

Locals were left stunned by what unfolded at the yacht club, claiming that such incidents had never occurred in the resort.

The club spans 16 acres on Lake Montauk and vessels that are docked range from small charter boats to superyachts.

Elites such as J.P. Morgan and Vincent Astor were some of the club’s original members.

Charles Lindbergh, who completed the first solo non-stop transatlantic flight from New York to Paris, was known to fly his seaplane to the harbor.

O’Slattara was the founder of the fashion label East X East, and she documented her ritzy lifestyle on social media.

She had been launching pop-ups for her brand in the Hamptons. 

Her TikTok account was peppered with travel and lifestyle content.

LAVISH LIFESTYLE

Pictures from her social media accounts showed her beaming on board a private jet. 

She was heading to a gig in Nashville with two pals. 

Nolan-O’Slattara was also seen taking in the surroundings as she enjoyed riding in a convertible. 

But, she previously worked as a bottle service girl in Soho after migrating to the US.

Tributes have been paid to the businesswoman following her death. 

“She was very friendly, always smiling,” one person told The New York Post.

Others described the entrepreneur as “incredibly kind.”

Dylan Grace, Nolan-O’Slattara’s business partner, said he felt “blessed” to have known her.

“Love you so much Mar,” he wrote on Instagram.

“Fly high girl.”

Irish Taoiseach Micheal Martin described the death of Nolan-O’Slattara as an “absolutely devastating blow for the family.”

Friends reminisced on their memories of the entrepreneur.

“She was a lovely woman, very driven to be successful in business,” one pal told The Irish Sun.

“I hadn’t seen her in a few years since moving home from the US but she was living a very glamorous lifestyle in New York.

“She was clever and knew what she was doing with her posts on social media.”