NEW YORK, June 28 (Reuters) - The International Monetary Fund said on Monday it approved a three-year, $1 billion program for Uganda, enabling an immediate disbursement of $258 million for budget support. The Extended Credit Facility arrangement follows emergency support of $491.5 million approved in May 2020, the IMF said. (Reporting by Rodrigo Campos; editing by Jonathan Oatis) Our Standards: The Thomson Reuters Trust Principles.