CHICAGO: Hawk-Eye will be installed for next month's Copa America, marking the first use of goal-line technology by the soccer's governing bodies for South America and for North and Central America and the Caribbean. The 16-nation tournament will be played at 10 US sites from June 3-26. Organizers also announced the match officials Wednesday. Three of the 18 referees are from the United States: Mark Geiger, Jair Marrufo and Armando Villarreal. Geiger officiated three games at the 2014 World Cup, including a second-round matchup between France and Nigeria in which he became the first American to referee a knockout stage match at soccer's top tournament. The other referees are Joel Aguilar (El Salvador), Jose Argote (Venezuela), Julio Bascunan (Chile), Enrique Caceres (Paraguay), Victor Carrillo (Peru), Andres Cunha (Uruguay), Roberto Garcia (Mexico), Heber Lopes (Brazil), Patricio Loustau (Argentina), Yadel Martinez (Cuba), Ricardo Montero (Costa Rica), John Pitti (Panama), Wilmer Rodan (Colombia), Gery Vargas (Bolivia) and Roddy Zambrano (Ecuador). Aguilar officiated the 2013 Snow Classico World Cup qualifier between the U.S. and Costa Rica in Commerce City, Colorado, a match played in a snow storm.