Yeah, seems unconfirmed as of now with the big major media outlets, but interesting. They seemed pretty sure right away with Nasrallah given they dropped a building on his head, but usually it's taken a couple of days for them to be sure with other top-level dirtbags, Hamas & Hezbollah alike. Apparently he's been pretty incommunicado for many weeks anyway, right, laying really low and people were questioning whether he was even alive?
Only thing giving me pause is it seems it was a small-arms fire confrontation. Sinwar used to do the dirty work himself back in his day no doubt, but would that guy be personally engaging in firefights these days now that he's top dog? Either the walls were closing in and he decided to go all suicide-by-IDF in a blaze of glory, or alternatively it could just be some look-alike. I'd wait on the majors reporting on it before believing it.
EDIT: Outlets like The Guardian & CNN reporting it by now, gives it more weight than a tweet. Seems it's the IDF confirming it though, so of course the conspiracies & denial will be pretty rampant among the usual from-the-river-to-the-sea type idiots. Hope they do it a little more transparently than the US did with ventilated-head Bin Laden, kinda feel like you might want to let the U.S. or some non-Israel-aligned university or whatever do a DNA test & a statement too. Can't do much about the coping-mechanism jihadi types who'll deny it no matter what, but you can prove it to the normals.
Good news either way, as with Hezbollah there aren't really any credible people to replace him with, they're already corpses. And whoever they pass the gig onto is no doubt going to be hard-pressed to be as vicious/psychotic as Sinwar, and most likely they'll be dumber.