US Secretary of State Condoleezza Rice said Friday that not enough has been done by the Israelis or the Palestinians to demonstrate their commitment to peace. "I have not hidden the fact that I think that there is a lot of room for improvement on both sides concerning both their obligations," Rice said. "Frankly, not nearly enough has happened to demonstrate that the Israelis and Palestinians fully understand or are somehow fully acting" on what needs to be done, she added. "Without following 'road map' obligations and without improvements on the ground, it's very hard to sustain this process," Rice said. Rice was speaking to reporters traveling with her during a two-day visit to Latin America. Neither the Israelis nor the Palestinians have fulfilled their obligations under the "road map" peace plan promoted by US President George W. Bush, who called a regional summit in Annapolis, Md. in November with the goal of seeing a deal struck by the time he leaves office. In the plan's first stage, the Palestinians were to dismantle armed groups. The Israelis were to freeze construction in West Bank settlements and remove some of the more than 100 unauthorized outposts set up by settlers since the 1990s.