The investigation into a US strike that hit a school in Iran has sat for months with a military command while leaders have held off on ordering a critical, standard intelligence review to help determine what happened, according to three sources familiar with the matter.

Within a week of the strike, the first two stages of a “battle damage assessment” focused on answering basic questions including whether the strike hit and damaged the intended target had been completed, indicating that the US was responsible for striking the Shajareh Tayyiba school in Minab, the sources said.

But a third standard review stage, a step where analysts – typically from the Defense Intelligence Agency – review the entire body of relevant satellite imagery and other intelligence sources to provide a more holistic determination about what took place and how a strike impacted the broader mission, was not ordered, the sources said. That review would almost always be conducted in the immediate aftermath of a noteworthy strike, they said, but it had not begun as of early July.

An independent investigation – announced in March – was separately launched, and interviews were conducted with service members involved with the strike. Sources said that the information gained from interviews, material that could be useful to commanders still launching strikes against Iran to avoid mistakes, has been “locked down” by US Central Command with only a handful of officers permitted access to the details.