The indictment, unsealed Monday, says they were planning to attack targets overseas. It is not clear if they were connected to Al Qaeda.
Seven North Carolina men were arrested and charged on Monday with conspiring to provide material support to terrorists overseas.
Federal authorities also charged the men with plotting to murder, kidnap, and maim individuals overseas as part of a plan to wage what prosecutors said was "violent jihad."
He allegedly conspired for three years to recruit young men to travel overseas for jihad, they said.
"These charges hammer home the point that terrorists and their supporters are not confined to the remote regions of some faraway land but can grow and fester right here at home," said US Attorney George Holding.
The seven men appeared in federal court in Raleigh, N.C., and were ordered held without bond pending a detention hearing set for Thursday.
It is unclear whether the group is alleged to be connected to Al Qaeda or some other overseas radical group. No such group is identified in a 14-page indictment unsealed on Monday. In addition, it is unclear who the intended victims of the group might be. No precise plot is identified in the indictment beyond a broad goal of waging "violent jihad."