Israel refuses Egypt peace treaty changes
23 September 2012 Last updated at 17:20 BST
Israeli Foreign Minister Avigdor Lieberman says there is "not the slightest" possibility that Israel will accept changes to its 1979 peace treaty with Egypt.
Increasing violence in the Sinai peninsula has prompted calls in Egypt to amend the treaty, which limits the number of its troops allowed in the area.
The unrest comes as Egypt's Islamist President Mohammed Mursi makes his first trip to the US, and to the UN General Assembly, since being elected in June.
Jon Donnison reports from Ramallah.