U.S. intelligence officials have concluded that the blast at a Gaza hospital last week was caused by a Palestinian rocket that suffered engine failure and broke apart into two pieces. While they have "high confidence" that it was not Israel who fired the rocket, they have "low confidence" in identifying which Palestinian group launched it. Previous indications pointed to Palestine Islamic Jihad (PIJ) as the likely culprit. However, the evidence was based on intercepted conversations between suspected Hamas militants discussing the rocket launch. Despite the authenticity of the audio, officials cannot confirm the identities of the individuals. U.S. analysis was based on intelligence, physical activity, open source video, and images that all led to the conclusion that the explosion was caused by a rocket blast, not an Israeli bomb or artillery round. The U.S. officials also disputed the death toll provided by the Hamas-led Health Ministry, suggesting a range between 100 and 300 casualties, likely at the lower end of that spectrum.