Palestinian Authority President Mahmoud Abbas said his people don’t want to establish their own state unless they’re assured that Jerusalem will be its capital.

Abbas, speaking today at a meeting of the World Economic Forum in Istanbul, blamed Israel for the standstill in peace efforts and called on the U.S. to help break the deadlock.

Palestinians want to create an independent state with east Jerusalem, the West Bank and the Gaza Strip, which Israel captured in the 1967 war. Israeli Prime Minister Benjamin Netanyahu says he won’t give up any part of Jerusalem, which he calls the nation’s “undivided, everlasting” capital.

Abbas also told WEF delegates that the West Bank and Gaza Strip currently offer opportunities for investors, particularly in real estate and tourism.