During the most recent conflict in 2014, Israel destroyed 32 tunnels.
"The IDF will not allow Israeli civilians to be harmed or Israeli sovereignty to be breached and will continue operating with determination in the face of all forms of terrorism", Manelis said in a statement.
The laboratory, which is run by Captain B, who has a background in both electrical engineering and chemistry, has been responsible for locating and destroying five terror tunnels in recent months.
On the eve of the visit to Cairo, Mahmoud Zahar, a senior Hamas official in the Gaza Strip, said that his group was prepared to "study any advice given to it, and would accept any advice that serves Palestinian interests".
They hope it will discourage new digs but worry it could prompt terrorists to preempt the razing of any existing passages by using them for attacks.
Israel has said it is sanctioning the owners of Gaza buses which transported Palestinian protestors to border demonstrators, reports the Associated Press.
The tunnel crossed into Israeli territory by several yards but did not yet have an exit point, military spokesman Jonathan Conricus told journalists.More news: Shutdown in Andhra over special status hits normal life
"There was no use of explosives, but rather, we filled the tunnel, which rendered it useless for a very long period of time". Such details are secret in Israel, which has received United States congressional funding for the project. According to the news report, Hamas, has switched to riots following the successful deployment of Iron Dome to negate the threat of rockets, and the laboratory, which has been thwarting Hamas's attempts to launch an underground raid against Israel.
Later on Sunday, Israel went public with a military laboratory it set up in 2016 to pool anti-tunnel expertise.
In the meantime, Gazans continue their protests along the border wall with Israel, which have been going since March 30 with more than 30,000 protesters and are expected to continue until April 19, Israel's Independence Day.
Israel offered no explanation for its publication about the laboratory, which followed a surge in Gaza border protests that organizers want to peak in mid-May - the 70th anniversary of Israel's founding.
Hamas, which is sworn to Israel's destruction, has denied having any such plans.
Former Defense Minister Moshe Ya'alon said that Israel is now the "world leader" in defending borders. "I wouldn't think that it's a coincidence", he added, without elaborating.