ISIS-K

A particularly potent affiliate is Islamic State Khorasan — or ISIS-K — which has mounted increasingly daring attacks in the last year, including an assault on a Moscow concert hall in March that killed more than 140 people, and a twin bombing during a funeral procession in Iran that killed some 100 people.

ISIS-K was also linked to the August 2021 bombing that killed 13 U.S. service members and about 170 Afghans as the U.S. was withdrawing from Afghanistan.

Earlier this year, American intelligence tracked ISIS-K threats in Iran and Russia and notified those countries’ governments.

In Iran, ISIS-K killed 84 people with a bomb; in Moscow, four gunmen claiming ISIS-K affiliation slaughtered more than 140 people at a concert hall.

The Taliban is monitoring some groups and fighting others — including ISIS-K — which is an improvement, from the U.S. perspective, on its behavior before 9/11.