INDIANAPOLIS (AP) — Federal authorities have arrested a suburban Indianapolis teenager accused of trying to join the Islamic State, commonly known as ISIS.

Prosecutors say FBI agents arrested 18-year-old Akram Musleh of Brownsburg while he tried to board a bus from Indianapolis to New York, where he was to fly to Morocco and on to territory controlled by the Islamic State. A criminal complaint alleges Musleh intended to provide material support to the terror group by joining it.

Spokesman Tim Horty of the U.S. Attorney’s office says Musleh had an initial hearing in federal court Tuesday on a charge of providing material support to the Islamic State. Horty says Musleh is in the custody of federal marshals at an undisclosed location.

Musleh’s attorney, Michael Donahoe, said he has no comment on the case.