Mexican official: Drug spy says he leaked DEA info A major drug cartel has infiltrated the Mexican attorney general's office and may have paid a spy inside the U.S. Embassy for details of DEA operations, Mexican prosecutors said Monday. The Drug Enforcement Administration's intelligence chief expressed concern about the alleged spy's claims, but said he couldn't confirm that the Embassy had been infiltrated, and that it was too early to pull out undercover agents for fear their identities may have been compromised. Mexico's Attorney General Eduardo Medina Mora said five officials of his Organized Crime unit were arrested on allegations they served as informants for the Beltran-Leyva cartel. He said there are indications other spies still work inside his agency. The Embassy employee, who also at one time worked for Interpol at the Mexico City airport, is now a protected witness after telling Mexican officials in Washington that he leaked details of DEA operations to the cartel, an attorney general's official told The Associated Press on condition of anonymity. The official said he was not authorized to speak on the record....