Greece’s Jewish community has denounced “anti-Zionist patrols” that harassed and intimidated Jews and Israelis on the streets of Thessaloniki, calling the incident a disturbing echo of one of the city’s most violent chapters nearly 95 years after assault squads first targeted its Jewish population.

Last weekend, the left-wing anarchist group Rouvikonas organized what it called “anti-Zionist patrols” through the streets of Thessaloniki—Greece’s second-largest city in the country’s north—saying the demonstrations were intended to confront a growing “Israeli and Zionist infiltration” across the city.

Joined by members of the “Permanent Struggle for Class Liberation” and the “Thessaloniki Liberation Initiative,” individuals were seen marching through the city wearing black T-shirts featuring Palestinian flags.