Communications intercepts confirm that ISIS’s Afghanistan-based branch carried out twin bombings in Iran that killed nearly 100 people. “The intelligence is clear-cut and indisputable,” said one source. ISIS claimed responsibility, but did not specify which affiliate was responsible. The US has clear intel that ISIS-K was behind the attack. ISIS harbors a virulent hatred for Shi’ites, Iran’s dominant sect. Iran has arrested 11 suspects and seized explosive devices and vests. ISIS-K has continued focusing on plotting foreign operations, US officials say.