Cuba has rejected U.S. charges that four expelled diplomats were involved in espionage.

A statement from the Cuban foreign ministry in Havana Friday said charges the four had engaged in unacceptable activities were completely untrue. The statement also accused the United States of lacking moral authority or justification in making the charges.

On Tuesday, the U.S. State Department expelled Oscar Redondo Toledo and Gustavo Machin Gomez for their alleged role in helping a defense intelligence analyst who was given a 25-year prison term for passing information to Cuban authorities.

The expulsion game shortly before two members of Cuba's mission to the United Nations in New York were asked to leave the country on charges of engaging in activities deemed harmful to the United States. The two were later identified as Francisco Gonazalez Garcia and Carlos Augusto Suanes Flexas.