Israel has underestimated the extent of Hamas tunnels in Gaza, which have been revealed to extend 560-720 kilometers and feature 5,700 entry shafts. The IDF has used various methods to combat the tunnels, including mapping them with drones and dogs, flooding them with seawater, and using liquid explosives. The military has also operated in the northern Gaza Strip, while the United Arab Emirates has provided $5 million in support of UNRWA's efforts in Gaza. Israel's plan to pump seawater into the tunnels has raised concerns about international law violations and long-term consequences, as it could contaminate freshwater and damage Gaza's infrastructure.