The phone lines in the tunnels allowed the operatives to communicate with one another in secret and meant they could not be tracked by Israeli intelligence officials, the sources told CNN.
They avoided using computers or cell phones during the two-year period to evade detection by Israeli or US intelligence, the sources said.
CNN has not seen the specific intelligence but spoke to sources familiar with it.
CNN previously reported that a series of strategic warnings from US and Israeli intelligence agencies did not lead officials from either country to anticipate the events of October 7.
Israel was aware that Palestinian militants had been using hardwired communication systems prior to the October attack.
Persons:
Yocheved, ”
Organizations:
CNN — Intelligence, CNN, National Intelligence, Israel Defense Forces, IDF
Locations:
United States, Israel, Gaza, Washington, Iran, Jenin, West Bank