A “small number” of the retired members of the Colombian military arrested last week in connection with the assassination of Haiti’s president have received training by the U.S. military, the Pentagon said Thursday.

In a statement to the Washington Post, Pentagon spokesperson LTC Ken Hoffman said, “A review of our training databases indicates that a small number of the Colombian individuals detained as part of this investigation had participated in past U.S. military training and education programs while serving as active members of the Colombian Military Forces.”

“The department routinely conducts training for thousands of military men and women representing partner nations from South America, Central America, and the Caribbean,” Hoffman added.

“[The training] emphasizes and promotes respect for human rights, compliance with the rule of law, and militaries subordinate to democratically elected civilian leadership.”