extensive tunnels in gaza. here s merlyn thomas. the israeli army has released this footage of a huge explosion which they say destroyed hamas infrastructure, including a tunnel network in gaza city. and by studying this video we have worked out it is around here, around palestine square in the heart of the city. and we know this because of these to a shaped buildings and the palestine stadium which you can see just here in the background. and i will show you that on this map, the two a shaped buildings and palestine stadium in the background. and just a day before this, the idf released several videos claiming to show hamas tunnels around this area. and this is the beginning of one of those videos, just next to the square. here is what they say is a tunnel entrance that is about to appear right here. and we know it is here because we can see building signs on the posts here. this is the one on the right and it is a sign for society for the deaf, which they also make referenc