Israelis attack school leaving many dead

The transcript describes a sudden attack on a UN-run school in Jabalia during morning prayers, resulting in casualties and chaos. Survivors recount their experiences, highlighting the lack of warning and the continuous assault. Israel claims the attack was a response to mortar fire from near the school, and further warnings were issued for future strikes.

How did the survivors react during the attack?

What warning did the Israelis drop before further strikes?