In 2022, the Sunni Muslim militant group Islamic State claimed responsibility for a deadly attack on a Shi'ite shrine in Iran which killed 15 people. Earlier attacks claimed by the group include deadly twin bombings in 2017 which targeted Iran's parliament and the tomb of the Islamic Republic's founder Ayatollah Ruhollah Khomeini. Baluchi militants and ethnic Arab separatists have also staged attacks in Iran. The U.S. assassination of Soleimani in a Jan. 3, 2020, drone attack at Baghdad airport and Tehran's retaliation by attacking two Iraqi military bases that house U.S. troops brought the United States and Iran close to full-blown conflict.
