One of Mexico's most-wanted drug lords has been killed in a shoot-out with state security forces. Arturo Beltran Leyva and four alleged members of his cartel died in a raid on a flat in Cuernavaca, south of Mexico City. The Beltran Leyva cartel, based on the Pacific coast, is one of Mexico's most powerful and violent drug gangs.<br/><br/> <br/>