JERUSALEM — Israel said on Sunday that it had destroyed a tunnel dug by Hamas from Gaza into Israeli territory, dealing a substantial blow to one of the main strategic assets in the Islamic militant group’s arsenal.

It was the second cross-border tunnel in six weeks that the Israeli military said it had detected and put out of use with new technologies, leading officials to predict the end of the cross-border threat from such tunnels.

“We have reached new technological capabilities in the struggle against terror tunnels,” Israel’s defense minister, Avigdor Lieberman, said in a statement.

Referring to Israeli border communities, he added, “I hope that in the coming months the tunnel threat to the residents of the ‘Gaza envelope’ will become a thing of the past.”