BEIRUT, June 18 (Xinhua) -- Supporters of Shiite militant group Hezbollah threw stones at the motorcade of U.S. Charge d'Affaires in Lebanon, Michel Sison, in the southern city of Nabatiyeh on Wednesday, the official National News Agency reported.

    Hezbollah supporters attacked the motorcade with stones when Sison, on a tour to south Lebanon, was having lunch at the residence of deputy head of the chamber of commerce and industry in Nabatiyeh, Abdullah Bitar, the report said.

    They also chanted anti-U.S. slogans such as "death to America," it added.

    Sison's bodyguards decided to evacuate the top U.S. diplomat in Lebanon fearing she might be attacked, the report said.

    The convoy was escorted by Lebanese internal security forces, as Hezbollah supporters tried to block the way, eyewitnesses was quoted by the news agency as saying.

    The opposition led by Hezbollah, blacklisted as a terrorist group by Washington, and the ruling majority clinched an agreement in Doha on May 21, ending a 18-month-long political deadlock in Lebanon.

    During a surprising visit to Beirut on Monday, U.S. Secretary of state Condoleezza Rice extended U.S. support to Lebanon's emerging democratically-elected government but said Washington still brands Hezbollah a terrorist organization.