MEXICO CITY (AP) — Mexico has sent drug lord Rafael Caro Quintero, who was behind the killing of a U.S. DEA agent in 1985, to the United States with 28 other prisoners requested by the U.S. government, the Mexican government said in a statement Thursday.

By Drazen Jorgic, Laura Gottesdiener and Lizbeth Diaz MEXICO CITY (Reuters) - Mexico on Thursday handed over major figures in the country's criminal underworld to U.S. authorities, part of a surprise extradition of nearly 30 jailed convicts or others accused of ties to violent drug cartels.

By Luc Cohen NEW YORK (Reuters) -Alleged drug cartel boss Rafael Caro Quintero, who spent decades in prison in Mexico for the murder of a U.S. drug enforcement agent, pleaded not guilty in a U.S. court on Friday to drug trafficking charges that could result in his execution.