The man was arrested Friday as he returned to the United States . A U.S. official told CNN that a federal grand jury in New York has approved an indictment against Sayoc. He joined the Army in 2007 and underwent eight months of advanced training for cryptology and intelligence , according to the government . Prosecutors say he claimed he intended to join the terrorist group Al-Shabaab . An official says there is no indication that any military information was compromised .
The man was arrested Friday as he returned to the United States . A U.S. official told CNN that a federal grand jury in New York has approved an indictment against Sayoc. Prosecutors say he claimed he intended to join the terrorist group Al-Shabaab . An official says there is no indication that any military information was compromised .