MEXICO CITY (AP) — Mexico's army says soldiers have detained a top operator for the powerful Sinaloa drug cartel.Suspect Ovidio Limon Sanchez is one of the most-wanted U.S. drug fugitives in Mexico. Washington has offered a reward of up to $5 million for him.Army Col. Ricardo Trevilla says Limon Sanchez is "one of the most important operators" for the cartel, which is headed by Joaquin "El Chapo" Guzman.The army spokesman said Thursday that Limon Sanchez was detained without a shot in a raid Wednesday in the northwestern city of Culiacan.Trevilla says the detention "significantly affects" the cartel's cocaine smuggling. Limon Sanchez is accused of buying, shipping and smuggling cocaine destined for the United States.