KYIV, Ukraine (AP) — Unidentified vandals have painted swastikas on a monument to a prominent Yiddish author in the Ukrainian capital.

Moshe Reuven Azman, the chief rabbi of Ukraine, posted pictures Monday of the monument to Sholem Aleichem outside Kyiv’s synagogue with big red swastikas spray-painted on it.

Police have opened a probe.

In a tweet, Foreign Minister Vadym Prystaiko denounced the anti-Semitic act as “disgusting, appalling and in need of prompt investigation.”

Israeli Ambassador Joel Lion tweeted that "Ukraine has to wake up,” urging authorities to track down the culprits, bring them to justice and also “educate against hatred."

Ukraine has seen numerous cases of vandalism at Jewish cemeteries and Holocaust memorials across the country. Hateful graffiti has also been painted on synagogues and Jewish institutions across the country.