Yehia Sinwar, Hamas’ political leader, claimed in 2021 that the militant group had 500 kilometers (310 miles) of tunnels. Yehia Sinwar, Hamas’ political leader, claimed in 2021 that the militant group had 500 kilometers (310 miles) of tunnels. I am telling you that the tunnels we have in the Gaza Strip exceed 500 kilometers,” Sinwar said following a bloody 11-day war with Israel. During a 2014 war, Hamas militants killed at least 11 Israeli soldiers after infiltrating into Israel through tunnels. An additional layer of complexityYet in all those cases, advancing militaries did not face the challenge that Israel does now with Hamas’ tunnel system.