Police yesterday scraped paint samples and took pictures of a black swastika found during the weekend on a street in Brooklyn Heights where a man was recently arrested for building bombs and painting a series of swastikas.

It appeared officers had little to go on as they launched the neighborhood’s latest hate crime complaint investigation, however. The alleged perpetrator of the previous incidents is behind bars at Rikers Island. The latest swastika, found Saturday morning on the side of a brownstone at 22 Remsen St., was found in an alleyway without surveillance cameras.

Police officials said hate crime investigators who took over the case yesterday said they had not identified any suspects or witnesses.

In the first incident, police said they identified Ivaylo Ivanov as a suspect almost immediately after a series of anti-Semitic markings and phrases were found last fall painted on cars and synagogues along Remsen Street, and on fliers scattered around the area. They enlisted him as a police informant as a ruse during the investigation, arresting him after an arsenal of bombs and weapons was found in his apartment on that block.

The owner of the brownstone where the swastika was found, Martha Spector, 50, a lawyer, said she painted over the swastika yesterday afternoon, after police finished collecting evidence.

“There’s a little alcove there. I think it was just an opportunity,” she said. “I think it’s just a stupid prank.”