KIEV, March 26 - A consignment of enriched uranium - enough to make a nuclear weapon, according to a U.S. expert - rumbled out of a Ukrainian railway depot late on Saturday bound for Russia, a move designed to coincide with an international summit on nuclear security, Reuters reported.

The 19 kilograms (42 pounds) of spent highly enriched uranium, loaded in four containers onto rail carriers in a high-security operation, was the last such material to be removed from the ex-Soviet republic under a two-year program with the United States and Russia.