(Times of Israel) Islamic State fighters left behind graffiti calling Kurds “Israeli dogs” as peshmerga forces expanded a major offensive against jihadist-held areas in northwestern Iraq on Saturday after breaking a months-old siege.

A photo showing writing on a Kurdish flag that read “The flag of Israeli dogs,” was taken today and posted on the Kurdish Rudaw news site, researcher Ceng Sagnic from Tel Aviv’s Moshe Dayan Center told the Times of Israel.

Ties between Israel and the Kurds run deep. A Mossad officer named Sagi Chori was sent to help his close friend, the late iconic Kurdish leader Mulla Mustafa Barzani, manage the Kurds’ battles against the Iraqi army in the 1960s.

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