Officials discover mass graves in Mexico - where the remains of at least twenty men have been recovered.<br/> <br />Mexican authorities said on Monday most of the victims have been dead for about two years.<br/> <br />All were males between the ages of 18 and 40.<br/> <br />At least 15 graves were found during a search that began on Friday - near the city of Ciudad Juarez in the state of Chihuahua.<br/> <br />The U.S. - Mexico border state has been one of the hardest hit by violence stemming from drug wars.<br/> <br />The victims appeared to suffer asphyxiation, head trauma or were shot.
