Sounds like a very convenient explanation:
"Mr Kirby was also questioned about an Israeli strike and a resulting fire that killed at least 45 Palestinians – many of them women, children, or elderly – at a camp for displaced people on Sunday.
Israel has said the strike targeted and killed two senior Hamas officials, and that it believes the fire could have been caused by an explosion at a Hamas weapons store nearby."
https://www.bbc.com/news/articles/cv22pl9p212o