Sweden

Security is being heightened in Stockholm over concerns the suicide bomber who detonated in a busy downtown street on Dec. 11 may have had accomplices. Sweden’s intelligence agency SAPO has launched an international investigation into the terrorist attack. Newspaper reports suggest that SAPO is aware of approximately 200 people in Sweden who are involved in some way with Islamic extremist networks.

Iraq

Islamic state

Syria

Aqap

Al shabaab

Boko Haram

Isis