In Washington, negotiations at the United States' ponsored peace talks between Egypt and Israel discussed conflicting claims on Tuesday (14 November) concerning oilfields in Sinai. An Israeli with-drawal from Sinai is part of the peace treaty conditions demanded by Egypt and the discussions centred on Israeli exploitation of the fields while it has occupied Sinai. At home, both countries have been studying an American proposal to meet in Egyptian demand to link the peace treaty to the Palestinian issue. In Ismailia on Tuesday, President Sadat was asked about the visit by Vice-President Hosni Mubarak to Washington, and the possibility of the talks being suspended.