United States officials suspect that Jonathan Pollard was not the only Israeli spy operating on U.S. grounds, former Israeli ambassador to Washington Itamar Rabinovich said on Monday in an interview with Israel Radio. Rabinovich, Israeli envoy to Washington from 1993 to 1996, said that officials in the U.S. intelligence community believe that Israel still conceals the full extent of its espionage activity on American soil. Speaking of his encounters with American officials, Rabinovich said that he “heard the claim concerning the enormous damage done to the Americans, but there is also a hidden one, which is not voiced openly, but is implied.” “They suspect that he wasn’t the only one, that there were additional Pollards, and that Israel, despite its promises, did not reveal all the cards in this case and in similar cases,” Rabinovich added. When asked, the former ambassador said he doubts Israeli spies operate in the U.S. today. According to Rabinovich, the U.S. is “punishing Israel at Jonathan Pollard’s expense. They are angry with Israel more than with Pollard.” Jonathan Pollard used to work as a civilian analyst for Navy intelligence. In 1987 he received a life sentence after he was convicted of spying for Israel. In 1995 Pollard was granted Israeli citizenship, but it was only in 1998 that Israel finally admitted it paid him in exchange for classified information. On Wednesday, President Shimon Peres will be awarded the United State' highest civilian honor, the Presidential Medal of Freedom by President Barack Obama. In a petition sent to Peres prior his departure, The Committee to Free Pollard asked the Israeli president to demand Pollard’s release. According to the group, some 70,000 people signed the letter, among them authors Amos Oz, A.B. Yehoshua and David Grossman, Nobel Prize winners Daniel Shechtman and Yisrael Uman, and former Israeli president Yizhak Navon. The committee said that Gilad Shalit, the Israeli soldier, who was kidnapped and held for over five years by Hamas in Gaza, who was released in October, also joined the call for Pollards release.