roastedDeflator, 6 months ago

I think that's the Al Jazeera article you are referring to:

Israel’s deadly attack on the Jabalia refugee camp: What we know so far

What happened, how many killed?
At least 50 people were killed after six Israeli air raids hit a residential area of the camp on Tuesday. A Hamas statement said there were 400 dead and injured in the attack. Casualty figures for Wednesday’s attacks are still not known.

In the article here it says

killing or wounding at least 400 persons

So it's not about only about the people being killed, it's also about the wounded ones.