Nauert said Martinelli's extradition followed normal procedures established by the countries' bilateral extradition treaty.
He was extradited Monday after spending a year in federal prison in Miami.
The 66-year-old Martinelli was Panama's president from 2009 to 2014.
These targets included Martinelli's political allies and opponents, their family members, his business rivals, Panamanian judges, journalists, union activists, USA diplomats, and others. The court denied his petition in January 2018.
In a brief statement released Sunday night, the Panamanian Foreign Ministry said that Martinelli remains in the custody of the government of the United States, until he is delivered to Panamanian authorities.
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He has been accused of using public funds to monitor the phone calls of more than 150 people, including politicians and journalists. His nation's highest court, the Supreme Court of Justice of the Republic of Panama, issued a warrant for his arrest in December 2015.
Martinelli's attorney Roniel Ortiz did not immediately respond to a request for comment. Martinelli is being extradited back to Panama to face political espionage and corruption charges.
Panamanian officials alleged that soon after becoming president, Martinelli Berrocal launched the National Security Council with a "special services" arm that carried out his confidential instructions.
WASHINGTON-The U.S. extradited Panama's former president, Ricardo Martinelli, to Panama on Monday to face criminal charges relating to corruption and illegal wiretaps while he served as the country's leader.
With the extradition now complete, Martinelli's case will now move forward in the Panamanian legal system.