The most ironic part of this is that Al Jazeera happened to live stream 2 angles of the entire incident. You can see the rocket launches, and the failed booster of the specific rocket, synced with phones on the ground already recording because they noticed the launch.
You can see how the rocket booster failed over the hospital, and then the explosion.
The videos were geographically confirmed by Geoconfirmed on Twitter, who only geoconfirms things without more analysis.
US intelligence is corroborating this with satellite imagery.
Hamas doesn’t have the firepower to cause that big of an explosion, but Islamic Jihad definitely has more powerful rockets that could have done that. They announced a launch like 4 minutes prior to the strike on their telegram I believe.