MONTAUK, N.Y. —

Elma said she later spoke with a detective in Montauk but was told no further information could be released due to the early stage of the investigation.

“We weren’t told anything about the circumstances,” she said, adding that Martha had planned to return to Ireland this week, and had called just days earlier to ask about a ride from the airport. “That was the last time we spoke.”

Authorities say the cause and manner of Martha Nolan-O’Slatarra’s death remain undetermined pending an autopsy. The Suffolk County Homicide Squad is leading the investigation. (Facebook/ Martha Nolan)

The death has rattled the Montauk community. Nolan was the founder of East x East, a boutique resort wear label she frequently promoted through stylish behind-the-scenes glimpses of her photo shoots and design process.

In one clip from a Mallorca campaign, she described the project as “a beautiful love story,” adding that “witnessing my visions come to life fills me with so much happiness.”

Her most recent posts included a July video celebrating a pop-up appearance at Gurney’s Resort in Montauk, captioned “Goals Achieved,” highlighting the culmination of her marketing efforts in the Hamptons.

According to her LinkedIn profile, Nolan received her bachelor’s degree in commerce and master’s degree in digital marketing from University College Dublin before moving to the Big Apple at age 26.

As Fox News Digital previously reported, the picturesque harbor town has seen its share of tragedy in recent years, including violent incidents that have shaken its peaceful image.

Law enforcement officers gather near luxury yachts at the Montauk Yacht Club marina as part of an active investigation into the death of 33-year-old Martha Nolan. (WNYW)

Fox News Digital has reached out to the Suffolk County Police Department for comment. Fox News Digital also reached out to Gurney’s Montauk Resort & Seawater Spa for comment.

A spokesperson for the Montauk Yacht Club, where the boat was docked, confirmed the incident but declined to provide further details.

“We are saddened to learn of the incident that took place,” the spokesperson told Fox News Digital. “Our team is cooperating with law enforcement in their ongoing investigation and remains committed to the safety and well-being of our guests and staff. We have no further comment at this time.”