French intelligence, while privately fingering Mossad, at the time announced publicly that the responsibility for his death was to be traced to the Abu Nidal Organization, a claim maded by an anonymous telephone caller stating he represented Abu Nidal, but which was quickly denied by that group. An anonymous caller phoned the bureau of the United Press International, claiming the murder was the handiwork of the Kahane Chai organization, and executed to revenge the killing of Rabbi Meir Kahane. The PLO pointed the finger at Mossad, which is now known to have organized his killing. At the time, Ehud Gol, spokesman for the Israeli Prime Minister Yitzhak Shamir, stated that claims of Israel's responsibility were "completely ridiculous" and did not merit a reply. Some Israeli authorities suggested it was the work of a rival Palestinian faction. General Uri Sagi, head of Israel's military intelligence claimed that Bseiso had been involved in both the 1972 Munich Olympics massacre, a failed attempt on the life of the Jordanian ambassador to London, and an abortive attack on an El Al plane in 1978, adding he did not know who was responsible.