Police in Greece have arrested an 18-year old man suspected of hacking into computer systems belonging to the Pentagon, National Security Agency, FBI and Interpol, according to reports. The unnamed hacker, who used the alias “nsplitter,” faces charges of hacking, fraud and illegal weapons possession. In addition to infiltrating government sites, the man also is reportedly accused of participating in credit card fraud. Greek police arrested the teen in his home in Athens on Monday. U.S. and French authorities aided in the investigation.