Khorasan Group has been thought a target of U.S. airstrikes . After first strikes in Syria , reports said top Khorasan members had been hit . The group is believed to be responsible for the deadly attack on an Ariana Grande concert last month that killed 22 people and injured more than 100 others.
Khorasan Group has been thought a target of U.S. airstrikes . After first strikes in Syria , reports said top Khorasan members had been hit . Official now says `` its 99.5 % certain '' they are alive .