Israeli and Palestinian leaders have agreed to hold confidence-building talks every two weeks that could eventually lead to discussions on a Palestinian state, US Secretary of State Condoleezza Rice said yesterday.A senior Israeli official made clear, however, that substantive talks on statehood between Prime Minister Ehud Olmert and Palestinian President Mahmoud Abbas would not be on the agenda for now. Other Israeli officials cited disagreements between Olmert and Rice over the scope of deliberations. "The issues would be security, humanitarian and the political horizon," the senior official said, the latter term a loose reference to a US-backed vision of a Palestinian state alongside a secure Israel. "Political horizon is not about specifics," the official said, appearing to rule out any discussion soon on core issues such as the future of occupied Jerusalem, the borders of a Palestinian state and the fate of Palestinian refugees.