Yehia Sinwar, Hamas’ political leader, claimed in 2021 that the militant group had 500 kilometres (310 miles) of tunnels. “They started saying that they destroyed 100 kilometers (62 miles) of Hamas tunnels. "Hamas terrorists operate inside and under Shifa hospital and other hospitals in Gaza," Rear Admiral Daniel Hagari, Israel's chief military spokesman, told a news conference. Gallant said that Hamas would confiscate fuel for generators that pump air into the tunnel network. During a 2014 war, Hamas militants killed at least 11 Israeli soldiers after infiltrating into Israel through tunnels.