Israeli police are investigating the desecration of the graves of slain Prime Minister Yitzhak Rabin and his wife, Leah.

Police said Monday the words "murderous dog" were written with black paint on the tomb of Mr. Rabin, who was assassinated in 1995 by a Jewish extremist for his land-for-peace deals with the Palestinians.

Last week, the grave of Theodore Herzl, the founder of the Zionist movement, was defaced with the words "Neo Nazi Hail Beilin."

Israel's founding father David Ben Gurion's grave was also desecrated.

Police say they suspect right-wing extremists opposed to Israel's planned withdrawal from the Gaza Strip and four West Bank settlements were responsible for the graveyard vandalism.