Washington (CNN) -- An espionage sting at Fort Bragg, North Carolina, has put a 22-year-old Navy Reserve intelligence specialist behind bars, according to federal authorities.
Agents of the Navy Criminal Investigative Service and the FBI took Navy Reserve Intelligence Specialist 3rd Class Bryan Minkyu Martin into custody Wednesday on suspicion of selling classified information.
According to an affidavit filed in U.S. District Court, Martin met with an FBI undercover agent posing as an intelligence officer of an un-named foreign country three times at a motel in Fayetteville, North Carolina, near Fort Bragg Army base. The documents allege he was paid a total of $3,500 in cash. The affidavit says Martin handed over documents marked "Top Secret" and "Secret" and signed receipts for two of the payments.
The application for a search warrant of Martin's apartment and car say he has been working for Joint Special Operations Command at Fort Bragg since September.
Martin has not been charged. He is being held in the Navy brig in Norfolk, Virginia, while the military reviews the evidence, according to an NCIS statement.
It could not be determined Monday whether Martin had retained an attorney, either civilian or military.
"Investigators have a high level of confidence that no classified information was actually delivered to any unauthorized persons," the NCIS release says.
The Navy did not release details of how Martin came to the attention of the investigators or how me made contact with the agent posing as a spy.