They denied it.

Scott Ritter wonders whether what’s-left-of-ISIS is jerking our chain:

The U.S. blamed Iranian-backed Khaitab Hezbollah (no relation to the Lebanese Hezbollah group), for the attacks.

There are several problems with this narrative, first and foremost being that the bases bombed were reportedly more than 500 kilometers removed from the military base where the civilian contractor had been killed. The Iraqi units housed at the bombed facilities, including Khaitab Hezbollah, were engaged, reportedly, in active combat operations against ISIS remnants operating in both Iraq and Syria. This calls into question whether they would be involved in an attack against an American target. In fact, given the recent resurgence of ISIS, it is entirely possible that ISIS was responsible for the attack on the U.S. base, creating a scenario where the U.S. served as the de facto air force for ISIS by striking Iraqi forces engaged in anti-ISIS combat operations.

No doubt, the only person in the world who wants to see regime change in Iran as much as Benjamin Netanyahu is Ayman al Zawahiri.

Update: Via Gareth in TAC, the NYT reported then, “It was not clear who was responsible for the attack. American forces in Iraq have been threatened by both Iranian-backed militias and the remnants of the Islamic State.”