[ti:0] [ar:0] [al:0] [offset:0] [00:00.00]U.S. Secretary of State Colin Powell says he regrets Israel's killing of a top Hamas official, [00:07.03]saying it could slow the Mid-east peace process. [00:10.31]Mr. Powell spoke in Jordan today at a meeting of the World Economic Forum. [00:16.29]He said the incident could be an impediment to progress. [00:19.88]The U.S. official joined representatives of the so-called Quartet of Mid-east mediators. [00:26.03]They're the United States, the European Union, Russia and the United Nations. [00:30.45]The group met on the sidelines of the economic meeting to discuss how to move forward on the Road Map to peace that they have drafted. [00:37.28]Meanwhile, the Palestinian militant group Hamas vows revenge for the killing of its senior Hamas official. [00:43.31]Israel Prime Minister Ariel Sharon has hailed the raid by the Israeli troops as successful.