Police officers are investigating the appearance of swastikas daubed on posts signposting walkways along the popular Stanmore Common Nature Trail.
The Nazi symbols were discovered by an Israeli visitor out walking on Shabbat and reported to both the Metropolitan Police and the Community Security Trust (CST).
David Oliver, whose Israeli cousin found the swastikas while visiting family, said he was “shocked” to find the graffiti in an area with a large Jewish population.
“I live in Edgware and you see the odd thing from yobs, but I’ve never seen anything like this, I was shocked to see it in Stanmore,” he said.
“Apparently there’s no CCTV in the area so I doubt there will be a lot the police can do.
It’s horrible to see this kind of thing in this day and age, but unfortunately it’s something we’re having to get used to.”
Mark Gardner, a director at the CST, said: “This was clearly a disgusting thing to find, especially in such an unexpected location.”