Officials report this latest tunnel was dug in recent weeks and it was found in the area that does not have the new tunnel barrier in place yet.
Conricus said that "to the best of our knowledge" there were no such casualties on Sunday, though he added that the tunnels could be "death traps" for Gaza gunmen.
This is the second terror tunnel the IDF has exposed and destroyed in a month's time.
Israel has made neutralizing the tunnel threat a top priority since that war, when Hamas militants on several occasions made their way into Israel. "It is by no means behind us, but this will surely force the terrorist organizations to change techniques and to adapt".
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The IDF announced on Sunday, 22 Kislev, another Hamas tunnel originating in Gaza and stretching into southern Israel has been discovered and destroyed.
Hamas, the armed group that controls Gaza, declined to comment.
Conricus described the tunnel as "very substantial", saying it contained communication systems, air vents, electricity and reinforced concrete structure.
Islamic Hamas movement's military wing Al-Qassam brigades called Sunday for the continuation of the "uprising and activating all means in resisting and confronting the occupation" in rejection of the USA decision to recognize Jerusalem as the capital of Israel. The decision has infuriated the Palestinians, who seek Israel-annexed east Jerusalem as their own capital. On Friday, two protesters were shot dead in skirmishes with Israeli troops along Gaza's border.