U.S. Says ISIS Was Responsible for Deadly Moscow Terror Attack
After a period of relative quiet, the Islamic State has been trying to increase its external attacks, according to U.S. counterterrorism.
ISIS K terrorist group, a branch of the Islamic State that has operated in Afghanistan, Pakistan and Iran, claimed the attack.
The regional affiliate has a haven in Afghanistan and carried out recent bombings in Iran, suggesting it has capacity for major atrocities.