Mapping Robots, Blast Gel: How Israel Is Waging War On Hamas Tunnels

The blast engulfed the building and sent smoke spewing out of at least three points along a nearby road in a district of the city of Beit Hanoun, surveillance footage showed.

After locating what they described as the entrance to a Hamas tunnel under an evacuated hospital in northern Gaza, Israeli army engineers filled the passage with exploding gel and hit the detonator.

The blast engulfed the building and sent smoke spewing out of at least three points along a nearby road in a district of the city of Beit Hanoun, surveillance footage showed.

"The gel spread out and exploded whatever they had been waiting for us in the tunnel," an army officer told reporters at a briefing at Zeelim Ground Forces Base in southern Israel.