The United States said on Saturday it still had differences with India on finalizing a landmark nuclear deal, but both sides were trying to sew up the pact before President George W. Bush visits New Delhi next week. The U.S. embassy statement came after Under Secretary of State Nicholas Burns left New Delhi after three days of talks with Indian officials over the civilian nuclear pact signed last July in Washington by Bush and Indian Prime Minister Manmohan Singh. "There are remaining differences but the U.S. hopes that they can be closed before the president visits India," the embassy in New Delhi said. India's powerful nuclear establishment is uneasy about details of the civilian and military separation plan, especially Washington's desire to see a large chunk of India's 22 nuclear reactors placed under international safeguards. "Both sides want to work it out and you need patience and to let the negotiators work it out," an U.S. embassy spokesman told Reuters late on Friday.