CNN — In the days since a blast ripped through the packed Al-Ahli Hospital in Gaza City, killing hundreds of Palestinians, dueling claims between Palestinian militants and the Israeli government over culpability are still raging. But forensic analysis of publicly available imagery and footage has begun to offer some clues as to what caused the explosion.

CNN has reviewed dozens of videos posted on social media, aired on live broadcasts and filmed by a freelance journalist working for CNN in Gaza, as well as satellite imagery, to piece together what happened in as much detail as possible.

Without the ability to access the site and gather evidence from the ground, no conclusion can be definitive. But CNN’s analysis suggests that a rocket launched from within Gaza broke up midair, and that the blast at the hospital was the result of part of the rocket landing at the hospital complex.

Weapons and explosive experts with decades of experience assessing bomb damage, who reviewed the visual evidence, told CNN they believe this to be the most likely scenario – although they caution the absence of munition remnants or shrapnel from the scene made it difficult to be sure. All agreed that the available evidence of the damage at the site was not consistent with an Israeli airstrike.

Israel says that a “misfired” rocket by militant group Islamic Jihad caused the blast, a claim that US President Joe Biden said on Wednesday is backed up by US intelligence. A spokesperson for the National Security Council later said that analysis of overhead imagery, intercepts and open-source information suggested that Israel is “not responsible.”

Palestinian officials and several Arab leaders nevertheless accuse Israel of hitting the hospital amid its ongoing airstrikes in Gaza. Islamic Jihad (or PIJ) – a rival group to Hamas – has denied responsibility.