Suffolk County police executed a search warrant Sunday at a storage unit connected with the Gilgo Beach murders.

Police were also seen back at the home of suspect Rex Heuermann in Massapequa Park on Long Island, News 12 reported.

The storage unit was at Omega Self Storage in neighboring Amityville.

“We have executed a search warrant for one of the storage units in relation to the Gilgo suspect case,” Det. Lieutenant Kevin Beyrer told News 12.

Beyrer did not say what investigators were looking for at the unit or what they took out of it.

Heuermann, a 59-year-old architect and father of two, was arrested Thursday in New York City and charged with the murders of Melissa Barthelemy, Megan Waterman and Amber Costello. whose bodies were buried on Gilgo Beach in burlap sacks, as CrimeOnline previously reported.  Investigators say he is the prime suspect in the death of Maureen Brainard-Barnes, the fourth of the “Gilgo 4,” whose bodies were found in December 2011.

All four women had disappeared long before their bodies were discovered. Brainard-Barnes was abducted in 2007, Barthelemy in 2009, and Waterman and Costello in 2010.

The bodies were found after another woman, Shannan Gilbert, disappeared months earlier. Her body was eventually found in the same area in December 2011. The bodies of four more women, a man, and a toddler were found in the area between the two Decembers, but investigators have not indicated whether they believe Heuermann had anything to do with those deaths.

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[Featured image: Storage unit search/News 12. Inset: Rex Heuermann/Suffolk County Sheriff’s Office via AP]