The US military could have used a Tomahawk cruise missile in the attack on a school in southern Iran, where Iranian state media says more than 160 girls were killed on February 28, CNN reports.

The video, posted on Mehr News, a semi-official Iranian news agency, is the first to show missiles striking the area, and adds to a body of evidence that appears to contradict claims by US President Donald Trump casting blame on Iran.

Sam Lair, a research associate at the James Martin Center for Nonproliferation Studies, told CNN the munition in the video is consistent with a US Tomahawk Land Attack Missile.

“First, it fits the visual characteristics of a TLAM. The cruciform shape with centrally mounted wings and a tailkit at the back. Second, the video was taken about 250 meters from the likely impact point. That means the munition has to be large. This rules out other munitions in the U.S. stockpile with similar visual characteristics like the GBU-69B [planning bomb],” the expert added.

CNN is continuing efforts to obtain images of the remnants of the munition that hit the school. Such evidence is key in assessing responsibility for a strike, and without it, assessments cannot be conclusive.

However, the location of the video indicates that the strike could have been made on a medical clinic located on the territory of the Islamic Revolutionary Guard Corps or an adjacent area.

Lair noted that the strike on the school itself is not recorded in the video, but it could have occurred as part of the same attack, during which similar weapons were likely used.

Earlier, CBS News reported that the US military may have struck the school due to outdated intelligence. According to a source familiar with the investigation, the educational institution was listed as part of a nearby Iranian military base.