A Look at IS-Khorasan-Group believed to be behind Moscow attack

Fighters with IS-Khorasan vow allegiance to Islamic State leader Abu Ibrahim al-Hashimi al-Qurashi, in this photo issued Nov. 5, 2019, by SITE Intelligence Group. The U.S. is assigning responsibility for Friday's Moscow attack on the group/ Courtesy Photo

WASHINGTON: The United States is assigning responsibility for Friday’s attack on a Moscow concert hall that killed more than 130 people on the Islamic State terror group’s Afghan affiliate, known as Islamic State-Khorasan, or IS-Khorasan.