More than 20 headstones were vandalized at a Jewish cemetery in northern Slovakia in the second such incident in the country in a week.

The 22 gravestones vandalized at a Jewish cemetery in the country’s northern town of Rajec appear to have been damaged in mid-December, according to the World Jewish Congress. The vandalism is currently under investigation by police.

The 60 gravestones knocked down and set on fire in the Jewish cemetery of Námestovo, a town in northern Slovakia near the Polish border, were discovered on December 16.

It is not known yet whether the two incidents are connected.

Anti-Semitic incidents of this nature are extremely rare in Slovakia, according to the World Jewish Congress.

In Central and Eastern Europe, inactive Jewish cemeteries often attract vagrants because they are often located outside urban centers and out of sight of law enforcement. Some incidents of vandalism have been attributed to drunks and drug users and are not always deemed hate crimes.