"Remote-controlled robots have been developed to enter and search the tunnels."

"Israeli engineers also have developed technology that uses acoustic or seismic sensors and software to detect digging, similar to the science used by oil and gas companies to detect oil reserves....  The battle to control and destroy this subterranean labyrinth, estimated at more than 300 miles, will be a key strategy for the Israeli military....  For these 'de-tunneling' operations, specialized units code-named Samur – Hebrew for 'weasel' – expect to squeeze through the narrow passages and find rocket assembly lines, stores of small arms and mortars and, deeper still, Hamas’ leaders’ lodging and headquarters – much of it probably booby-trapped with homemade bombs. They may also be searching for some of the more than 200 hostages taken from Israel who may be hidden in those same tunnels.... The fight in Gaza may bear some similarities to operations in Fallujah, or in Mosul, where U.S.-backed Iraqi forces flushed Islamic state fighters out of a tunnel network in 2014...."

From "Hamas built a massive tunnel network in Gaza. Here’s how Israeli ‘weasel’ forces will fight it" (USA Today).

Human "weasels" and robots... but what about dogs? I'm remembering the killing of al-Baghdadi and Conan the military dog.

No mention of dogs in USA Today, but I'm seeing this in the London Times — "Inside the Hamas tunnel network — where the war may be decided/Using dogs, ‘sponge bombs’ and search-and-destroy teams, Israel’s ground invasion depends on clearing the underground network, which could be as long as 300 miles":

Within [the Yahalom] branch of the Israeli special forces are sub-units such as Samur (“Weasel”) commandos, trained in subterranean fighting and equipped with ground-penetrating radar and tunnel-mapping robots. A canine sub-unit, Oketz (“Sting”), comprises dog-handlers whose charges are able to sniff out entrances.

“Military dogs can detect entrances and sniff out bombs within the tunnels. Dogs can go ahead of their soldiers and attack incoming threats — by, for example, biting [fighters’] arms so they cannot shoot,” [said John Spencer, chairman of urban warfare studies at the Modern War Institute and a former infantryman]....

[T]he IDF has favoured trying to destroy rather than penetrate the tunnels using bulldozers, bunker-buster bombs or even by pouring in wet cement — a tactic used to stop Hezbollah, the Shia Muslim militia, from building tunnels along Israel’s border with Lebanon during Operation Northern Shield in 2018.

This approach is similar to the tactics adopted by other armies facing insurgent guerilla fighters hiding out in tunnels. In the 1970s, the US relied on B-52s to carpet-bomb the Cu Chi tunnels when it became clear that other attempts to flush out North Vietnamese fighters from their jungle hideouts had failed. In Ukraine, Russia bombed the Azovstal steelworks in Mariupol incessantly and waited until its last Ukrainian defenders had run out of supplies, forcing their surrender....

There are also "sponge bombs" — "a very simple innovation to seal a tunnel rapidly.... It’s not like they explode — they just expand, similar to industrial foam sprayed underneath homes to fix foundation problems. Say you pass a small manhole entrance and you want to move past it temporarily, because you never want to leave a tunnel behind you: this is one of the tools you could use."

ADDED: From "How Israel trains introverted ‘weasels’ to crack down on Hamas’s tunnels/'I have been in the tunnels, and once you go down you very quickly lose all sense of direction and all sense of time'" (National Post):

Soldiers who can tolerate the claustrophobic environment inside the tunnels are recruited to become “weasels.” IDF has determined that the best candidates for the job are those who are introverted and “disconnected.” 

An officer explained that it takes a soldier “who can make that psychological distance from the situation … You have to be able to distance yourself, to turn inward.” A tunnel soldier compared himself to a fighter pilot: “Really, with all the gear you have to know how to operate; it’s … more complicated than operating an aircraft.”