Nassau cops threaten to fine gawkers at suspected Gilgo Beach serial killer Rex Heuermann’s home

Gawkers beware: Nassau County cops don’t want you taking selfies in front of the accused Gilgo Beach serial killer’s house for your Instagram account.

Police warn that anyone blocking traffic or clogging the street rubbernecking at accused murderer Rex Heuermann’s ramshackle red house will be slapped with a $150 summons.

“Basically you can’t stop and impede traffic,” a Nassau County police spokesman told the Daily News on Tuesday. “You’re supposed to know that when you get your learner’s permit. They’re going be erecting signs all around the block [that say] no stopping, no standing, no parking.”

He also warned reporters not to take any more photos of the Massapequa Park home on First Ave., though it’s unclear what authority cops would have to block journalists’ First Amendment rights.

Suffolk County prosecutors may be exempt from the new traffic mandate. County District Attorney Ray Tierney held a gridlock-inducing press conference on Tuesday afternoon closing the street off to cars to announce the collection of a “massive amount” of possible evidence after 12 days of rooting through the Manhattan architect’s home.

Neighbors have been walking their dogs an extra block to catch a glimpse of the property, according to The New York Times. Others traveled 30 miles to cast their eyes on the home of the man accused of one of the most gripping recent serial killer cases.

“I feel horrible for the neighbors,” Michael Iavarone, of Huntington, told the paper. “It’s become a tourist spot.”

Police could be seen setting up surveillance cameras on utility poles near the home.

Authorities nabbed Heuermann on July 13 after a renewed effort to solve the case tied him to three of the victims through DNA and cell phone data. Long Island investigators have been on the hunt to identify and arrest the killer for more than 10 years. Nearly a dozen bodies have been found in the brush along the desolate stretch of road near Gilgo Beach.

Heuermann was charged with the murder of three of the victims and is expected to be charged in the death of a fourth victim as well. He’s pleaded not guilty.

Authorities in at least three other states — Nevada, New Jersey, and South Carolina — are checking their cold case files for possible connections to the suspect.