Comment by bhouston

Someone brought up recently that the UK used tunnels to house military infrastructure during WWII, specifically they converted some tube stations and other things to military command centres, and some of those centres still operate.

https://twitter.com/Alonso_GD/status/1747929379869540802

In the Israeli media, there is rumours from families of hostages that some hostages are dying from poison gases being pumped into the tunnels:

https://www.jpost.com/israel-hamas-war/article-782544