Israel's prime minister is warning that peace treaties can be canceled, hinting at his concern over the turmoil in Egypt over anti-government protests.

Benjamin Netanyahu said peace is not necessarily permanent. He said, "It can be unraveled from without; it can be unraveled from within."

He did not mention Egypt by name in a speech Monday before European Parliament members, but he has expressed concern about a takeover by Islamic radicals who might cancel the Israel-Egypt peace treaty signed in 1979.

Also, Netanyahu warned that the greatest danger to world peace is radical Islamists getting nuclear weapons, or a nuclear power going Islamist.

He said, "The first is called Iran, the second is called Pakistan."