Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Colombia Threatens Cuba, Wants Guerrilla Leaders Returned Associated Press BOGOTA, COLOMBIA - Colombia threatened Tuesday to denounce Cuba at the United Nations unless it immediately turns over two guerrilla commanders believed to be living on the communist island. The demand came in a letter sent to the Cuban Embassy in Bogota. President Ivan Duque first pressed Cuba to arrest two National Liberation Army leaders after the group claimed responsibility for a car bombing in January that killed 22 people at a Bogota police academy. But now the Duque government warns that it could denounce Cuba as a state sponsor of terrorism at the upcoming U.N. General Assembly because of the threat of an alliance between the ELN and a rearmed faction of the Revolutionary Armed Forces of Colombia (FARC). "As a result of the new circumstances, Colombia demands the Republic of Cuba immediately hand over to our judicial authorities all of the members of the ELN that are in Cuban territory," the letter said. Further isolate Cuba The new pressure being exerted by Colombia threatens to further isolate Cuba in the region at a time it is already reeling from U.S. sanctions aimed at cutting off its support for Venezuela, which Duque has also threatened to denounce to the United Nations. .