QUITO, Ecuador (AP) — Ecuadorean President Alfredo Palacio sent troops to guard oil facilities seized from Occidental Petroleum Corp. as they are transferred to state control, officials said Tuesday. But officials said the cancellation of Occidental's operating contracts and the seizure of its assets did not mean the Andean nation is nationalizing its oil industry. snip The Bush administration responded to the measure by breaking off negotiations on a free trade agreement with Ecuador.