Six relatives of Mexican marine killed , President Felipe Calderon says . Arturo Beltran Leyva was killed in shootout with drug cartel last week 's . Drug lord Marine also was killed in last week 's incident .
Three relatives of Mexican marine killed , President Felipe Calderon says . Marine was killed in shootout with drug cartel last week . Drug lord Arturo Beltran Leyva also was killed in last week 's incident .