The intelligence shared with #US officials by #Israel reveals how #Hamas hid the planning of the operation through old-fashioned counterintelligence measures such as conducting planning meetings in person and staying off #DigitalCommunications whose signals the Israelis can track in favor of the #HardwiredPhones in the tunnels.

Hamas operatives used phone lines installed in tunnels under Gaza to plan Israel attack over 2 years, sources familiar with intelligence say
https://edition.cnn.com/2023/10/24/politics/intelligence-hamas-israel-attack-tunnels-phone-lines/index.html