A US Marine talks with an FBI investigator in front of the US Embassy in Dar es Salaam after it was blown apart in a 1998 terrorist bombing. PHOTO|FILE
What you need to know:
The report by the Intergovernmental Authority on Development (Igad) says Al-Shabab, like the Islamic State militant group, is increasingly recruiting young men and women from countries beyond its power base, including Tanzania. Other countries are Kenya, Ethiopia, Djibouti and Uganda.