The Israeli military says it has finished sealing the last of a series of Hezbollah attack tunnels under the country's northern border with Lebanon, roughly six months after they were found.

Military spokesman Lt. Col. Jonathan Conricus told reporters Monday during a tour of the tunnel that it was "the longest and deepest attack tunnel that Hezbollah dug," plunging more than 80 meters (260 feet) below ground.

Israel launched "Operation Northern Shield" in December to find and destroy what it said were six Hezbollah tunnels burrowed into Israeli territory for the purpose of attacking soldiers and civilians. Hezbollah has not commented.

Conricus says the military has "now completed this operation" and that "it is safe to say that there are no more Hezbollah cross-border attack tunnels from Lebanon into Israel."