ALSO READIsraeli aircraft bomb Gaza strip after Hamas' rocket attack, Intifada claim Hamas movement leader agrees to hand over Gaza Strip to Palestine Trump recognises Jerusalem as capital of Israel, shifting policy Religion, politics and history: Uproar over Jerusalem declaration explained Trump declares Jerusalem as Israel's capital: Arab world, UN condemn move
Lt Col Jonathan Conricus, a military spokesman, told reporters on Sunday that Israel used a new set of "tools" to destroy the tunnel.
He said forces had detected the tunnel months ago and continued to monitor construction efforts by Hamas militants before demolishing it.
He said the tunnel was not complete, but was "very substantial," equipped with electricity, communications equipment, and a ventilation system.
It was located about one kilometre from an Israeli community.
Israel has placed a high priority on halting the tunnel threat since Hamas infiltrated Israel during the 2014 war.