The Muslim cemetery at Kafr Qaddum, a West Bank village located some eight miles west of Nablus, was vandalized Friday.
Security forces called to the scene found several headstones desecrated with "Kahane was right" slogans, hailing Rabbi Meir Kahane, the late leader of the radical Kach movement, and Stars of David.
IDF forces launched an investigation and together with Civil Administration officers, erased the slogans.
IDF and Civil Administration sources told Ynet they viewed the incident as very serious, "Even more serious that the desecration of the mosque several weeks ago," and one which jeopardizes the area's fragile stability.
The Judea and Samaria Police launched a concurrent investigation, saying forensic investigators collected evidence from the scene.
Extreme right-wing activist Itamar Ben Gvir, a known Kahane supporter, denied any involvement in the act: "The spraying of slogans the likes of 'Kahane was right' is a popular phenomenon, especially as the anniversary of Rabbi Kahane's murder approaches.
"We had nothing to do with the Kafr Qaddum incident. Personally, I think it's wrong to desecrate a cemetery, but I'm hardly moved by it. The Mount of Olives cemetery is desecrated daily, and I have yet to hear any condemnation from those shrieking now."
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