Police searched a Long Island storage unit connected to suspected Gilgo Beach serial killer Rex Heuermann Sunday night as investigators continue to scour for evidence in the long-unsolved murders.

Suffolk police executed a search warrant at a single unit located at Omega Self Storage in Amityville “in relation to the Gilgo suspect case,” Suffolk police told News12 Long Island.

Several police cruisers were seen at the unit, located at 185 Sunrise Hwy., late Sunday night and crime scene tape cordoned off the entrance to the parking lot in front of the locked units, according to photos taken by The Post.

Earlier in the day, state police confiscated hoards of guns along with a large child-like doll, cat food, a scratching post, an empty bookcase and a framed picture from Heuermann’s home in Massapequa Park, just a short drive away from the storage unit.

“We’re just going through his house looking to see if there’s any evidence,” a police source told The Post of the search of the alleged killer’s home. “If he has any trophies.”

Heuermann, a 59-year-old married father and architect at a Manhattan firm, was arrested and charged Friday with the 2010 killings of Malissa Barthelemy, 24; Megan Waterman, 22; and Amber Costello, 27. He is also the prime suspect in the murder of a fourth woman, 25-year-old Maureen Brainard-Barnes, but hasn’t been charged in her killing.

The four women’s remains were found wrapped in burlap and discarded along Ocean Parkway near Gilgo Beach in December 2010.

By spring of the following year, the number of bodies found along the same stretch climbed to 10 — including eight women, an unidentified man and a toddler.

Their killings remained unsolved in a case that went cold for more than a decade until Suffolk County’s new police commissioner created a special Gilgo Beach Homicide Investigation Task Force in February 2022.

The Long Island dad of two was linked to the killings after his DNA left on discarded pizza crust was positively matched to DNA left behind on the body of Waterman.

Heuermann pleaded not guilty to the three murders during a Friday court appearance.

When asked about the storage unit search by The Post, Suffolk Police referred all questions related to the investigation to the Suffolk County District Attorney’s Office, which could not be immediately reached.