MEXICO CITY/WASHINGTON (Reuters) - U.S. prosecutors will drop drug charges against ex-Mexican Defense Minister Salvador Cienfuegos and turn over the investigation to Mexico, saying “sensitive” foreign policy considerations outweighed the interest in pressing the case.The surprise decision to dismiss the charges in the politically explosive case was announced in a joint statement on Tuesday from the U.S. Department of Justice (DOJ) and Mexico’s attorney general’s office. “The United States has determined that sensitive and important foreign policy considerations outweigh the government’s interest in pursuing the prosecution of the defendant,” prosecutors from the U.S. Eastern District of New York said in a court document unsealed on Tuesday. U.S. authorities said the 72-year-old ex-general, accused of using his power to protect a faction of the Beltran-Leyva drugs cartel in Mexico while ordering operations against its rivals, had agreed to voluntarily return to Mexico if the U.S. case against him was thrown out. Cienfuegos, who served as head of the military and was former President Enrique Pena Nieto’s top defense official from 2012 to 2018, pleaded not guilty earlier this month to the drug trafficking and money laundering conspiracy charges following his October arrest in the Los Angeles airport. After a hearing on Wednesday in a Brooklyn federal court, where the judge is expected to sign off on the prosecutors’ request, Cienfuegos will likely be transported back to Mexico in the custody of a U.S. Marshal, the court documents show. “Tomorrow justice will be done,” said Edward V. Sapone, Cienfuegos’ U.S.-based attorney said in a brief statement. The arrest of Cienfuegos, who for years worked closely with U.S. counterparts on cross-border criminal matters and was a leading figure in Mexico’s drug war, put a severe strain on security ties between the two countries. The Mexican government was not forewarned of the investigation or arrest, which angered Mexican sensitivities at the highest level. His arrest shocked Mexico’s security establishment, given his close ties to a range of current senior officials.