Three relatives of Mexican marine killed , " Felipe Martinez said . Calderon said in a speech Tuesday . One was killed in battle with drug cartel last week . Drug lord Arturo Beltran Leyva also was killed in last week 's incident .
Three relatives of Mexican marine killed , " Felipe Martinez said . One was killed in battle with drug cartel last week . Drug lord Arturo Beltran Leyva also was killed in last week 's incident .